tag:blogger.com,1999:blog-15753132780956219842024-03-05T05:18:59.384-04:00BUTO1 Buccoo Reef CREWS/IMA Buoy Field LogThis site is for recording maintenance records of the Institute of Marine Affairs (Trinidad and Tobago) & NOAA CREWS station for data management purposes. Please update this blog whenever new operations are performed in the field, so that NOAA/AOML can coordinate data management efforts with the CREWS field efforts.Dr. James C. Hendeehttp://www.blogger.com/profile/09781192265417891159noreply@blogger.comBlogger23125tag:blogger.com,1999:blog-1575313278095621984.post-60181220017068673852018-03-23T09:02:00.004-04:002018-03-23T11:01:38.364-04:00March 2018 updateHi All,<br />
<br />
We lost communication from the Buccoo CREWS in October 2017. It wasn't until March 8th 2018 a team was able to bring in and diagnose the problem.<br />
<br />
The unit and its mooring lines were de-fouled. (The fouling at this location is particularly aggressive.) The main battery voltages were found to be low and were replaced. Again, the modem was non-functioning. We will replace the voltage regulator as well.<br />
<br />
As for the EXO2, while attempting to calibrate, it was non responsive. After a battery change, same result. This will need to be shipped away for repairs. Also, the central wiper unit needs replacement. I suspect that spending that amount of time in the water while not operating may be the culprit.<br />
<br />
Unfortunately, while moving the buoy out of the water and onto the transport vehicle some damage occurred to the frame. A crack near the top and a broken radar reflector. These will be corrected before re-deployment.<br />
<br />
As with the Angel Reef CREWS, we are waiting on parts before we can redeploy. As soon as we know the dates, I will update.<br />
<br />
<i>*Again, I wish to stress that these units are not being maintained often enough, I am hoping this will be addressed soon.</i><br />
<i><br /></i>
Cheers,<br />
<br />
Jonathan Gomez<br />
<br />
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<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-67156034221003575552016-12-14T10:11:00.000-04:002016-12-14T10:13:08.310-04:00<span style="font-family: Arial, Helvetica, sans-serif;">Hello everyone,<br />Finally a proper update on the Buccoo Reef CREWS station.<br /><o:p> </o:p>On December 1st a team from the IMA towed in the CREWS, cleaned, and started troubleshooting.<br /> On opening the main canister, there was some evidence of salt water intrusion and damp desiccant bags. Not a lot, but enough that small droplets were visible on the batteries. On further investigation, the voltage regulator was not outputting any power. However, it was still charging the batteries as it should. Some corroded connections were cleaned and that solved the power issue.<br /> <o:p> </o:p>Next issue was the modem. The power indicator light was on, but no sign of network activity or antenna signal. We switched the sim card with a new one, but still no change. Finally, we changed the entire modem with a spare one. That solved the communication problem and the CREWS is now transmitting normally.<br /> <o:p> </o:p>There was an unexpected problem with the EXO2 probe and it's umbilical cord. One of the six pins had corroded away. This is probably why we were not seeing the dissolved oxygen and pH readings. This will be corrected before we redeploy the CREWS.<br /> <o:p> </o:p>To prevent any more water intrusion I will do a thorough leak test before deploying, I do not think this was done during the last service.<br /> <o:p> </o:p>That's basically the jist of it and I'll update on the progress of the EXO repairs.<br /><o:p> </o:p>Regards,<br /><o:p> </o:p>Jonathan Gomez<br />Marine Technician<br />Institute of Marine Affairs</span><br />
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-45191453777114081562016-08-02T15:35:00.000-04:002016-08-02T15:35:09.080-04:00some observations about buoy statusThe following is a brief status update based on a close examination of the data record, in a similar manner to <a href="http://buto1-log.blogspot.com/2016/05/status-based-on-examination-of-data.html">an earlier update last May</a>.<br />
<ul>
<li>The analog RH/AirT sensor remains nonfunctional. Based on my direct
observation of similar problems with the Calabash Caye buoy I believe
this is probably a buoy wiring problem and not a failure of the
instrument itself.</li>
<li>The EXO's CT2 sensor does appear to be more reliable than the
problematic CT sensor it replaced. Also there is a clear signal in the salinity data when local calibrations were redone in March and again in May, <a href="http://buto1-log.blogspot.com/2016/05/news-and-photo-from-jonathan-gomez.html">as described by Jonathan Gomez</a>.</li>
<li>DO data disappear following the March visit, the explanation for which can be found <a href="http://buto1-log.blogspot.com/2016/07/quick-buoy-update-from-jonathan-gomez.html">in another Jonathan Gomez update</a>.</li>
<li>Diagnostic data continue to suggest that the interior of the 'Main' canister is unacceptably moist, which has been true (but worsening) since last December's maintenance operation. </li>
</ul>
<i>(posted by Mike Jankulak)</i>
Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-39198401087556238052016-07-07T08:36:00.000-04:002016-08-01T16:45:54.943-04:00quick buoy update from Jonathan Gomez<i>[The following is another (slightly edited) email received from
Jonathan Gomez on July 7, 2016. It contains information about both
Tobago buoys, this one and <a href="https://arto1-log.blogspot.com/">the one at Angel's Reef near Speyside</a>.]</i><br />
<blockquote class="tr_bq">
Just a quick update on the CREWS. There are a couple issues we would like some assistance with.<br /><br />1. Still no Dissolved oxygen or pH readings are showing up in the data stream from the EXO2 when connected to the CREWS. However, all sensors are showing up and giving readings when connected via Bluetooth when we are calibrating. Please note that the DO sensor was installed in error on the Speyside CREWS last December, but this has since been corrected. <br /><br />2. We were unable to establish a connection to the CREWS using Loggernet when connected with the supplied umbilical cable. Thus, we were not able to install the software to add the new BIC instruments to the data stream.</blockquote>
<i>(posted by Mike Jankulak)</i>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-66035451788389539412016-05-26T12:36:00.000-04:002016-05-26T12:36:26.656-04:00met data from this buoy are now feeding NDBC and the worldLast week I began feeding the 10-minute meteorological data from the two Tobago buoys to the National Data Buoy Center (NDBC). A few days later NDBC notified me that those data feeds have been cleared for release to the Global Telecommunications Systems (GTS), which makes those data available for use by national weather services all over the world.<br />
<br />
The Buccoo Reef buoy, which we informally refer to as BUTO1, has officially been designated 42087, which is in keeping with the custom of giving all-numeric designations to buoys. The NDBC home page for the Buccoo Reef buoy may be found here:<br />
<br />
<a href="http://www.ndbc.noaa.gov/station_page.php?station=42087">http://www.ndbc.noaa.gov/station_page.php?station=42087</a><br />
<br />
This link has also been added to the 'Links' section on the right-hand side of this blog.<br />
<br />
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<br />
regards,<br />
Mike J+<br />
<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-6592703045572623322016-05-23T08:32:00.000-04:002016-08-01T16:36:49.484-04:00news and photo from Jonathan Gomez<i>[Note: the following is a slightly edited version of an email received from Jonathan Gomez (who, along with Addison Titus, have been maintaining the two CREWS buoys in Tobago since Jahson Alemu's departure last March) on May 23, 2016. This post is back-dated to that date.]</i><br />
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<blockquote class="tr_bq">
I'll give you some updates on the two CREWS. Myself and Addison removed the EXOs in March for servicing and calibration. Also, both CREWS's support lines and buoy were cleaned of fouling and inspected for wear. Also, in early May the BIC hardware was installed and we took the opportunity to service and calibrate the Buccoo EXO again. The software still needs to be installed for the BIC sensor to be added to the data stream however. We plan to do this in the next few weeks with guidance from Jon Fajans.<br />
<br />
There are a couple issues with data from the EXOs however. For the Buccoo EXO, all parameters are functioning fine while doing the calibrations, but when connected to the CREWS we aren't seeing Dissolved Oxygen and pH in the data streams.<br />
<br />
It also turned out there was a mix-up with the DO sensor. It was accidentally installed on the Speyside EXO during the December 2015 servicing. This with be corrected on our next trip mentioned above.<br />
<br />
I think those are the main issues we have at the moment, if we have any others I'll let you know.<br />
<br />
Both ADCPs are deployed and running. We downloaded the last set of data in March. I believe Jahson would do this every 6 months so we are continuing with that schedule for now.<br />
<br />
I've attached two photos of the CREWS for you, 'Picture 303' is the Speyside one, and 'Picture 255' is the Buccoo one. </blockquote>
<i>posted by Mike Jankulak</i>Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-89324101689669614462016-05-20T13:01:00.000-04:002016-05-20T13:01:10.836-04:00status, based on examination of data streamHaving posted <a href="https://arto1-log.blogspot.com/2016/05/status-based-on-examination-of-data.html">a similar message on the Angel's Reef (Speyside) buoy's blog</a>, I am continuing my data analysis by turning to the Buccoo Reef buoy. These messages were prompted by an absence of any updates from the field -- basically I am trying to see what we can conclude about local events based only on examination of the data.<br />
<br />
As a reminder, this station's recent history includes <a href="https://buto1-log.blogspot.com/2015/12/2015-annual-maintenace.html">its annual equipment swapout</a>
(December 9th - 10th, 2015), at which time the EXO Sonde was reinstalled
after been absent for warranty repairs since July 17st, 2015. These
repairs included an upgrade to a titanium bulkhead and the replacement
of the CT module (conductivity/temperature sensor, which reports
salinity as well) with an improved CT2 module. It was hoped that the
reengineered CT2 module would eliminate the many problems with failures
of the temperature and salinity parameters experienced over this
station's lifetime since late 2013. After the 12/10/2015 swapout was
completed, no further updates were received apart from <a href="https://buto1-log.blogspot.com/2016/02/change-in-maintenance-team-for-tobago.html">an announcement on February 5th, 2016</a>, that Jahson Alemu would no longer be our primary local contact for the Tobago buoys.<br />
<br />
As of May 16th, 2016, the following observations can be made about this buoy's data stream:<br />
<ul>
<li>The EXO Sonde was indeed reconnected during the annual swapout and
started producing data on December 10th, 2015, after an
absence of nearly five months.</li>
<li>The EXO Sonde went offline from March 16th to 19th, 2016. My guess
would be that the instrument was removed for three days during some kind
of maintenance operation, which seems likely considering that the EXO at the Angel's Reef buoy went offline for five days at the same time (March 18th - 23rd).</li>
<li>The Buccoo Reef EXO additionally went offline twice in May, once for two hours on May 1st, 2016, and then again for one day from May 4th - 5th, 2016.</li>
<li>Since last December, apart from the aforementioned interruptions in March and May, the
EXO seems have produced consistent and reliable sea temperature data.</li>
<li>Compared to the performance of the EXO at Angel's Reef, this Buccoo EXO's salinity data are more believable. In the absence of a second conductivity/salinity sensor on-site giving redundant data reports, nothing can be said for certain, but it is at least possible that the CT2 sensor at Buccoo Reef is producing reliable salinity data. </li>
<li>As for the other EXO parameters: Turbidities might be okay; Chlorophyll, Blue-Green Algae and FDOM fluctuate above and below zero and those sensors may be bad (or badly calibrated); pH data are either garbage or missing; and dissolved oxygen values may be reasonable.</li>
<li>The analog AirT/RH sensor remains offline, as it has been since early 2014. Based on my experience with a similar failure and repair at
the Calabash Caye buoy I believe that this is likely to be a problem with
buoy wiring and not a failure of the RM Young sensor itself.</li>
<li>We do, however, have air temperature and humidity reports from
the integrated WXT unit. Although these reports cannot be validated by
redundant readings from the analog AirT/RH sensor, they appear to be
believable.</li>
<li>Wind speeds and directions, as well as barometric pressures,
continue to be reported redundantly by multiple sensors, and all appear
to be consistent and correct.</li>
<li>Of the two diagnostic RH (humidity) sensors with the buoy's two sealed junction boxes (JBs), the "Met" JB humidity levels are perfectly dry, as they have been throughout this buoy's lifetime. However the "Main" JB humidity levels are all consistently above 80% and are a cause for concern. The Main JB humidity levels were only moderate before the 12/10/2015 annual maintenance operation, and jumped much higher afterwards, suggesting that the Main JB may not have been sealed/dried properly, may require fresh desiccant, or may have developed some kind of leak/crack. This JB's o-ring, desiccant and interior should be examined at the earliest possible opportunity.</li>
</ul>
We do not have any reports about how often the EXO Sonde's
modules have been recalibrated on-site since December of 2015. According
to the manufacturer many of these modules should be recalibrated on a
monthly basis.<br />
<br />
I will post any further updates that are
received at AOML. The next annual maintenance operation should be
carried out this coming December, or earlier.<br />
<br />
Mike J+Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-71260430136638624432016-02-05T05:59:00.000-04:002016-05-19T13:37:54.695-04:00change in maintenance team for Tobago stations<i>[This blog update is back-dated to February 5, 2016, which is when
AOML received the email announcement reproduced here. -- Mike Jankulak]</i><br />
<blockquote class="tr_bq">
Good morning,<br /><br />I
write to informed you that effective March 3rd 2016, Jahson Alemu
would no longer be employed at the IMA. Mr Jonathan Gomez and Mr
Addison Titus (copied on this email) will be responsible for CREWS
maintenance until we find a replacement for Mr Alemu.<br /><br />If there
are any concerns/ issues with regards to the CREWS in Tobago, can you
please send an email to me and copy Mr Gomez and Mr Titus.<br /><br />Thanks for your continued cooperation.<br /><br />Best regards<br />Rahanna<br /><br />Rahanna A. Juman, PhD<br />Principal Research Officer/ Deputy Director (Ag.)<br />Institute of Marine Affairs<br />Hilltop Lane, Chaguaramas<br />Trinidad and Tobago<br />West Indies</blockquote>
Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-38127380207379913072015-12-22T07:39:00.001-04:002015-12-22T07:39:02.287-04:002015 Annual maintenaceFollowing servicing and repair by YSI (much appreciated), the sonde was received in Trinidad and Tobago in December 2015.<br />
<br />
Over
the period 9-10 December BUCO1 underwent annual maintenance, which involved bringing the unit to shore for a thorough inspection of
all instruments and the re-installation of the sonde.<br />
<br />
9 th Dec 2015 (day 1)<br />
<br />
There was bird poop everythere, especially on the solar panels and the connector ports,/bulkhead, and even a deal gull (and this wasn't the first time). Some consideration is being given to how to treat with avian fouling at this site. Otherwise, no
obvious damage was noted to any of the above water instruments. As expected the base and anchor ropes were laden with large
colonies of barnacle and fleshy algae, especially as the unit had not been visited since
the EXO2 was removed for repair. The buoy base, ropes and sub surface
floats did not seem to be compromised as a result of the fouling.<br />
<br />
The
unit was brought to shore, cleaned and inspected. Interface with the BUCO1 could only be established by serial connection. The RF and cellulatr connectios were unsuccessful. This seems to be a recurrent problem in
interfacing with the units, especially for the purposes of data back-up,
as logistically it is not always feasible to serial connect to the main
data logger. (Ideas??) - I<b>t's 22 Dec 2015 and re're still unable to establish cellular connectivity with the buoy, but we can now connect to ARTO1.</b><br />
<br />
The WXT only was adjusted to align
more with the RM Young anemometer, as recommended by Mike. The WXT connectior to the support pole seemed a bit slack and was tightened.The
disparity between the two anemometer was be between 1-2 degs by the end of the day.<br />
<br />
2-3 inches of pooled water was noted within the main bulkhead. Possibly due to faulty O rings or improper sealing when last it was opened. All water was removed, the O-ring replaced for good measure and 7 packs of desiccant inserted. By morning main RH dropped to ~7%.<br />
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZXYwJ5vLap1ZHouipHWdoicBFvarQT5h5y8C7fkL13XZvL7HFdzsK6V_Yv-E5gZFgCQG7kLaHsHB9eyEsyz0oS3e_KtaZLq7tBSVCVl9tfofvZXIqma1q3YMsNOyU_KhYec89RDVTksk/s1600/IMAG1058.jpg" imageanchor="1"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZXYwJ5vLap1ZHouipHWdoicBFvarQT5h5y8C7fkL13XZvL7HFdzsK6V_Yv-E5gZFgCQG7kLaHsHB9eyEsyz0oS3e_KtaZLq7tBSVCVl9tfofvZXIqma1q3YMsNOyU_KhYec89RDVTksk/s200/IMAG1058.jpg" width="112" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihfOGXnxNYwmCYY1CBY7petW6LWCnlVNFcWCxfpq7X871JnioEhp9n1Tkmgb33GRlA4wtQuAb1q4v5n8RqaqkfQnj1DWBfTBsohzlTGVWoDp4DvqsGVrm92wpRaeMa4lj95J7sl-NKxdQ/s1600/IMAG1065.jpg" imageanchor="1"><img border="0" height="112" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihfOGXnxNYwmCYY1CBY7petW6LWCnlVNFcWCxfpq7X871JnioEhp9n1Tkmgb33GRlA4wtQuAb1q4v5n8RqaqkfQnj1DWBfTBsohzlTGVWoDp4DvqsGVrm92wpRaeMa4lj95J7sl-NKxdQ/s200/IMAG1065.jpg" width="200" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjV2sVaFlIw45Wq0LwowYe6gO8_23_O0-l23ljwhi6g_ZaYU5RQC1vHxzGjVBDEZD3IpiTxdo8Nqy8Ltw4RlNt3l6GTd1PAJr-PgfVRljifNfsewNFrolrCElq9pQ6syEmPV3qU8jT4vw/s1600/IMAG1069.jpg" imageanchor="1"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjV2sVaFlIw45Wq0LwowYe6gO8_23_O0-l23ljwhi6g_ZaYU5RQC1vHxzGjVBDEZD3IpiTxdo8Nqy8Ltw4RlNt3l6GTd1PAJr-PgfVRljifNfsewNFrolrCElq9pQ6syEmPV3qU8jT4vw/s200/IMAG1069.jpg" width="112" /></a><br />
<br />
<br />
10th Dec 2015 (day 2)<br />
<br />
<br />
Cell and RF connections were still unsuccessful, and serial connection was working fine. All data was downloaded and backed up.<br />
<br />
All connections and ports were clean and unbroken.<br />
<br />
The met data logger humidity was acceptable and no dessicant was inserted into this.<br />
<br />
The
EXO2 was installed and all seemed functional. A new umbilical cord
should be acquired to reduce the strain on the connector cable to the
sonde. Also, some sacrificial anodes should be acquired. A dummy plug
currently fills a vacant slot and the anode on the outside of the buoy
are near fully dissolved.<br />
<br />
BUCO1 was re-deployed without incident.Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-83764712664207829232015-07-20T19:17:00.000-04:002015-07-20T19:17:13.967-04:00Oceanographic instruments are downThe BUTO1 sonde was removed on 17 July 2015, to be sent to YSI for inspection.Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-49998738796812671642015-06-25T11:06:00.002-04:002015-06-25T11:06:59.249-04:00June 2015 <div class="" style="clear: both; text-align: justify;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGKD9pLRP_sOiBrttm11cyQcztmFqifY_A7oCpnFSvBR5DZ5Tsry14cfuFSpgSzq6U5j4a7rU0dSjE-UEfOpzjXrRUEsA9fzQQO-p85SkCuA-uDHFXekDxVNX2JCqpRgz9LEpcCKcboOM/s1600/ph+error.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;">The Buccoo Buoy was inspected on 23 June 2015. All fouling was removed
from anchor lines, buoy base and metal frame. The sonde was removed and
cleaned. All probes except for ph were fully calibrated and passed the
QC. The error in the picture below was noted, even after two attempts at
calibrated. The error was overidden and the sonde redeployed.</a></div>
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGKD9pLRP_sOiBrttm11cyQcztmFqifY_A7oCpnFSvBR5DZ5Tsry14cfuFSpgSzq6U5j4a7rU0dSjE-UEfOpzjXrRUEsA9fzQQO-p85SkCuA-uDHFXekDxVNX2JCqpRgz9LEpcCKcboOM/s1600/ph+error.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="179" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGKD9pLRP_sOiBrttm11cyQcztmFqifY_A7oCpnFSvBR5DZ5Tsry14cfuFSpgSzq6U5j4a7rU0dSjE-UEfOpzjXrRUEsA9fzQQO-p85SkCuA-uDHFXekDxVNX2JCqpRgz9LEpcCKcboOM/s320/ph+error.png" width="320" /> </a></div>
<div class="separator" style="clear: both; text-align: justify;">
<br /></div>
<div class="separator" style="clear: both; text-align: justify;">
The main buoy was also open and the dessicant replaced. All circuitry
seemed fine within the buoy and all external connectors were intact.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
All
three ports for the RM Yound RH/Temp were also tried to see if this
will correct the exisitng problem (no data is currently being colected),
however there was no change to the status of the instrument.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
New anodes are required for the sonde and the main buoy.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
The Sontek ADP was retrieved and the data downloaded. The battery was changed and the instrument redeployed. </div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
<b>Can this information also be hosted online with the CREWS data?</b></div>
<br />
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4LkAqtDv1Ena6wdSlWDOKPEMQG73mDUlmP-orYXsvTgrWjtADSX7WbPuOuE0qMUJobN1psRVeA7Mmnd_fhxouiMmPT1RE8FMjO7_XWC2nqdR4I8M0YM2ivoyPj8OAuG0vnitiej0G91k/s1600/DSCF3492.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4LkAqtDv1Ena6wdSlWDOKPEMQG73mDUlmP-orYXsvTgrWjtADSX7WbPuOuE0qMUJobN1psRVeA7Mmnd_fhxouiMmPT1RE8FMjO7_XWC2nqdR4I8M0YM2ivoyPj8OAuG0vnitiej0G91k/s320/DSCF3492.JPG" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><b>Anchor rope fouling</b></td></tr>
</tbody></table>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGpZwAKQ2NXjWKPF6IHhazFSWLPI0Q87iFoJ9lsuizvoIW35oV0Ll0-OrWlER91D5DUzyH_HDmLEeh45hW0BD_5zVAgKgMJFTmF3j3GVUD4eHT8L3iJ3if5xfWPrUO7NUaTE2rOYdFgmY/s1600/DSCF3477.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGpZwAKQ2NXjWKPF6IHhazFSWLPI0Q87iFoJ9lsuizvoIW35oV0Ll0-OrWlER91D5DUzyH_HDmLEeh45hW0BD_5zVAgKgMJFTmF3j3GVUD4eHT8L3iJ3if5xfWPrUO7NUaTE2rOYdFgmY/s320/DSCF3477.JPG" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">ADP</td></tr>
</tbody></table>
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBFsd7avqaEaunOsTDPhYoaD_UVlJ-5iTrV_mpHG79lcvRaaYnl3qjSa4aQwP2uQrTd31jQXeQc4-v8dHbkeUkqnQtQ6ERJhbprFbbg0wNIZs2rDW68Qe6Pgr0izdABYTa6eh6ZiG9fvQ/s1600/DSCF3493.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBFsd7avqaEaunOsTDPhYoaD_UVlJ-5iTrV_mpHG79lcvRaaYnl3qjSa4aQwP2uQrTd31jQXeQc4-v8dHbkeUkqnQtQ6ERJhbprFbbg0wNIZs2rDW68Qe6Pgr0izdABYTa6eh6ZiG9fvQ/s320/DSCF3493.JPG" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Buoy base fouling</td></tr>
</tbody></table>
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheAdvvBdOtdzLzmAwYXH41O5FzIx9L3ZOHpSKXmtjPHdlWL2WId18tcilmKB40Zze87CtPS-fC_Bue3NNYxBhfyT_lPnYNt_TLYvwEFIK3XhQSvGW_6VHLB3auYN69eP2PBFFnpj7bNng/s1600/DSCF3510.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheAdvvBdOtdzLzmAwYXH41O5FzIx9L3ZOHpSKXmtjPHdlWL2WId18tcilmKB40Zze87CtPS-fC_Bue3NNYxBhfyT_lPnYNt_TLYvwEFIK3XhQSvGW_6VHLB3auYN69eP2PBFFnpj7bNng/s320/DSCF3510.JPG" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Anode disintegration</td></tr>
</tbody></table>
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPgHl4ZMI0Qhs9Tp8gx78qdn9PeDTSCp6nIkVSK1X93AZj7M7xRzxwkV0Y8HgpEAlFrrVnlvzR6QC_WRKgkCLJeNM3WQ6THO1J-9GbuQpvdiLIXjGGM4iGmfbgbAwb8FrHxYEqdq13z6A/s1600/DSCF3514.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPgHl4ZMI0Qhs9Tp8gx78qdn9PeDTSCp6nIkVSK1X93AZj7M7xRzxwkV0Y8HgpEAlFrrVnlvzR6QC_WRKgkCLJeNM3WQ6THO1J-9GbuQpvdiLIXjGGM4iGmfbgbAwb8FrHxYEqdq13z6A/s320/DSCF3514.JPG" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Probes to be cleaned</td></tr>
</tbody></table>
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFo_dwdpeXjy5nERGR1wAR_g0ZsQUpdXlnN3loMczRY7NfsUUEPZv4v4zQ-2wJb5R7FK_8HCHf_MFMbumuyqPyKyg5DP6sXy41T7rX2ZWQdjtByfbTE4bmJRqF3m_MtOv7HglUFBNHCHQ/s1600/DSCF3520.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFo_dwdpeXjy5nERGR1wAR_g0ZsQUpdXlnN3loMczRY7NfsUUEPZv4v4zQ-2wJb5R7FK_8HCHf_MFMbumuyqPyKyg5DP6sXy41T7rX2ZWQdjtByfbTE4bmJRqF3m_MtOv7HglUFBNHCHQ/s320/DSCF3520.JPG" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Fouling growing beneath casing</td></tr>
</tbody></table>
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEAy18S_j2MklFt9tC7n792r42OyHXnGV5p6qFbgzqSuh_B14WcdfhaBJmyeJgexhZ5a8kh_vRo-UmftSdd1tDbU_YCQJuI9-b2eSOcNrsEosBJoYzy0e_dENToW-vlJEGfkDa7fpGkBU/s1600/DSCF3521.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEAy18S_j2MklFt9tC7n792r42OyHXnGV5p6qFbgzqSuh_B14WcdfhaBJmyeJgexhZ5a8kh_vRo-UmftSdd1tDbU_YCQJuI9-b2eSOcNrsEosBJoYzy0e_dENToW-vlJEGfkDa7fpGkBU/s320/DSCF3521.JPG" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Mild erosion on sonde</td></tr>
</tbody></table>
<br />
<br />
<br />
<br />
<br />
<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-17350524724130131522015-06-12T17:00:00.000-04:002015-06-17T10:04:44.610-04:00Voltage trends at Buccoo Reef, 2013-presentThis post is expected to be the last of a series of posts to share the results
of my recent evaluation of data produced by all of the CREWS/CCCCC buoys
over their lifetimes, from 2013 to the present. This post will briefly discuss the curious downward trend over time in voltage minima that is common to all three operational buoys.<br />
<br />
This trend was first remarked upon in an email conversation between myself and Matt Previte of YSI on January 7th and 8th, 2015. We had had occasion to examine the voltage levels at the Little Cayman (CCMI2) buoy because on December 29th, 2014 it had suffered a complete loss of power. Subsequent to discovering that power failure I posted <a href="http://ccmi2-log.blogspot.com/2015/01/ccmi2-buoy-offline-power-failure.html">an analysis of 2014 voltage levels for CCMI2</a> with particular attention to the final month of data. In this post I remarked:<br />
<blockquote class="tr_bq">
Note the unexplained, slow downward trend of low voltages throughout the
year. This is not obviously related to the final loss of power but it
is still curious.</blockquote>
Matt's email to me on January 7th touched upon that subject very briefly:<br />
<blockquote class="tr_bq">
I'm also surprised by the gradual, overall decline in min/max of the daily battery voltage. I'll ask around to see if anyone else has thoughts on that. It wasn't below operational levels and batteries due wear, but seemed a little odd.</blockquote>
My own January 8th reply to this remark included the following:<br />
<blockquote class="tr_bq">
I'm pretty sure I've seen similar patterns at (some of?) the other buoys, but I will have to let you know next week if I can back up that statement with real data. [...] I agree that the gradual low-voltages decline is mildly worrying without being hugely alarming.</blockquote>
In fact I did not follow up on this subject as promised until now, since I've just spent several weeks looking at trends in all of the CREWS/CCCCC data, and indeed the gradually-declining trend of voltage minima appears in the data from all three operational buoys.<br />
<br />
For this post, we examine the voltage trends at Buccoo Reef, Tobago (BUTO1). Voltages are sampled every five seconds and then at 10-minute intervals the minimum voltage from the last ten minutes is reported. This graph shows voltage minima reported by the Met datalogger (green) and the Main datalogger (red) as well as their difference (in blue, equal to Met - Main). The first two parameters are graphed on the left axis and the third on the right, with both axes sharing the same scale but offset from one another by 11V.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghFP0Mq8zmK6Luj7SPGgtYdXE2gIDw6pshf2z9DzKkRpjMvD_kQwvn0bRhhUW1Que1k-hPYLrKAP51VtFwLRUhFijlKPsBPhF-GVr95sXTxLX2ouo6zIgA99UvTQ77nKFJJbdDuKTuNXUQ/s1600/battv-buto1.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="290" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghFP0Mq8zmK6Luj7SPGgtYdXE2gIDw6pshf2z9DzKkRpjMvD_kQwvn0bRhhUW1Que1k-hPYLrKAP51VtFwLRUhFijlKPsBPhF-GVr95sXTxLX2ouo6zIgA99UvTQ77nKFJJbdDuKTuNXUQ/s400/battv-buto1.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Please click on this image to see it in larger form.</i></td></tr>
</tbody></table>
<br />
The most notable feature of this graph is the station's failure from May 15th to August 11th, 2014. There is also a short period of initially charging the batteries following the first deployment on November 27th, 2013. Data for this analysis were last refreshed on June 9th, 2015.<br />
<br />
At this station the Main voltages were slightly lower than the Met voltages (by 0.108V on average) so my subsequent analysis of battery minima focuses on the <i>Main</i> voltages.<br />
<br />
My informal analysis looked for the 'lower edges' of the minima to try to quantify how much they were decreasing over time and how quickly. This is a largely subjective evaluation. For BUTO1, this 'lower edge' was about 12.75V at deployment time once batteries were fully charged (after six days). This edge crept lower still by about 0.1V every 4-9 months until at present I estimate it to lie at about 12.42V, for a loss of about 0.33V overall. The downward trend at this station slowed in the later part of the dataset (i.e. the trend may have decelerated slightly).<br />
<br />
Similar analyses were carried out for this buoy's sister stations at Speyside / Angel's Reef, Tobago (ARTO1) and at Little Cayman, Cayman Islands (CCMI2). Two of the stations (BUTO1, ARTO1) reported lower <i>Main</i> voltages on average and one (CCMI2) reported lower <i>Met</i> voltages. All three stations exhibited a gradual downward trend in voltage minima, losing on average 0.1V every 4-8 months, with some slight changes in pace noted (decelerating at BUTO1, accelerating at ARTO1, constant at CCMI2). There was also one reversal of this trend noted at CCMI2 following that station's power loss and redeployment in early 2015.<br />
<br />
The
complete analyses for the other voltage minima, including
graphs, may be found at <a href="http://arto1-log.blogspot.com/2015/06/voltage-trends-at-speyside-angels-reef.html">this link for ARTO1</a> and at <a href="http://ccmi2-log.blogspot.com/2015/06/voltage-trends-at-little-cayman-2013.html">this link for CCMI2</a>.<br />
<br />
(signed)<br />
Mike Jankulak<br />
<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-65086077805009414212015-06-12T14:24:00.000-04:002015-06-12T14:28:36.696-04:00Junction Box Humidities at Buccoo Reef, 2013-presentThis post is part of a series of posts to share the results
of my recent evaluation of data produced by all of the CREWS/CCCCC buoys
over their lifetimes, from 2013 to the present. This post will discuss
the diagnostic relative humidity (RH) data collected from inside two of the buoy's junction boxes: the 'Main' and 'Met' junction boxes which house the Main and Met dataloggers, respectively. Overly high humidities within either of these junction boxes could lead to a failure of the buoy's controlling electronics and lengthy interruptions in the data stream.<br />
<br />
By way of example please see <a href="http://ccmi2-log.blogspot.com/2015/03/with-lc-crews-station-being-offline.html">this post from the Little Cayman station log</a> (including photos), which concludes that a "catastrophic power loss" was caused by "condensation" within the "solar panel junction box." To my knowledge there are no diagnostic RH sensors deployed in the solar panel junction boxes at any CREWS/CCCCC station but this serves as an important lesson about the damage that moisture incursion can have on station operations. In this case the Cayman station was nonoperational for 73 days and when redeployed it was found that communications with the WXT (Vaisala's 'Weather Transmitter') had failed, which may indicate another yet-undiagnosed effect of junction box condensation at that buoy.<br />
<br />
The following graph shows the Buccoo Reef (BUTO1) diagnostic RH values plotted over the buoy's deployment lifetime to date (through June 9th, 2015). The red line is RH maxima as measured within the <i>Main</i> junction box and the green line is RH maxima as measured within the <i>Met</i> junction box.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgsI-0aa8f3wLXWcPLmzO-b9qf92R-bwBzqWyxCkP2VwDNR5Ep96ANGIddUdNKcbjUTAC3pQF1klJUgt6oI0n5D5hZ0CgJjEvZPQJLbJnjSYFaKzqQqstP64Z3iH7Di1EAuCDaEGJaGh5IZ/s1600/rhdiag-buto1.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="290" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgsI-0aa8f3wLXWcPLmzO-b9qf92R-bwBzqWyxCkP2VwDNR5Ep96ANGIddUdNKcbjUTAC3pQF1klJUgt6oI0n5D5hZ0CgJjEvZPQJLbJnjSYFaKzqQqstP64Z3iH7Di1EAuCDaEGJaGh5IZ/s400/rhdiag-buto1.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Please click on this image to see it in larger form.</i></td></tr>
</tbody></table>
<br />
The large gap in data is from when the station was entirely offline due to a power failure, from May 15th to August 11th, 2014. The highest spike in the Main RH (red line) occurred on November 13th, 2014, while the buoy was undergoing maintenance on land and was likely measured at a time that the junction box was open to the moist outside air.<br />
<br />
Note that these data report only the <i>maximum</i> RH seen in a ten-minute period of those raw values collected every five seconds.<br />
<br />
A natural question is how humid is <i>too</i> humid? I have heard it suggested that these junction box humidity maxima should not exceed 20%, and BUTO1's Met junction box RH data shows that this is an entirely <i>attainable</i> goal and can be regarded as a <i>reasonable</i> target. However, at what point should overly-high RH values prompt remedial
intervention? I have for many years run CREWS programming tests inside
my office which has had the side-effect of collecting a long-term
dataset of indoor RH values, in an environment that is dry enough to
prevent any damage from moisture or condensation. Based on these
somewhat accidental datasets I would suggest that RH values up to 50%
may be considered <i>tolerable</i>, but that prolonged measurements of diagnostic humidity in excess of 50% should be considered cause for immediate reparative action.<br />
<br />
The story told by these data, then, is twofold: the <i>Met</i> junction box (green line) remains extremely dry throughout the buoy's lifetime, but the <i>Main</i> junction box (red line), despite starting out very dry, has grown more humid over time to the point where RH has remained between 60% and 80% since the November 13th, 2014 maintenance operation (with 99.1% of all reported values falling within this range during this period).<br />
<br />
Based on our <i>ad hoc</i> standard, then, BUTO1's <i>Main</i> junction box started its deployment acceptably dry but humidities gradually increased until they began exceeding our <i>targeted</i> level of 20% after three months. We cannot know what the Main RH levels were like during the station's mid-2014 power failure but immediately upon resumption of operations the Main RH levels were alarmingly high and have remained strictly higher than 50% humidity in 98.5% of Main RH measurements reported since that time (August 11, 2014). Therefore this station can be said to have a persistent and long-lasting problem with moisture incursion into the Main junction box which should be attended to at the earliest opportunity. [This station's Met junction box, on the other hand, requires no humidity intervention whatsoever.]<br />
<br />
Similar analyses have been conducted at this station's sister buoys located at Speyside / Angel's Reef, Tobago (ARTO1) and at Little Cayman, Cayman Islands (CCMI2). A pattern that is common to all three of these buoys is that the <i>Main</i> RH levels are all presently at alarming levels, after starting out acceptably low during initial deployment and increasing much more quickly than the <i>Met</i> RH levels do. This might suggest a design or construction problem with the moisture seals on the <i>Main</i> junction box, or a lack of clear deployment instructions regarding proper sealing of the junction boxes and the use of fresh desiccant.<br />
<br />
The <i>Met</i> RH patterns at the three buoys range from BUTO1, where Met RH levels start low and stay low throughout the buoy's entire lifetime, to ARTO1, showing a mildly-increasing trend of Met RH levels that is not yet any cause for alarm, to CCMI2, where Met RH levels began low but increased quickly and are presently at levels that are alarmingly high. There does not seem to be any reason to suspect a <i>systemic</i> problem with the <i>Met</i> junction box design, construction, or deployment practices as there is in the case of the <i>Main</i> junction boxes.<br />
<br />
The
complete analyses for the other RH diagnostics, including
graphs, may be found at <a href="http://arto1-log.blogspot.com/2015/06/junction-box-humidities-at-speyside.html">this link for ARTO1</a> and at <a href="http://ccmi2-log.blogspot.com/2015/06/junction-box-humidities-at-little.html">this link for CCMI2</a>.<br />
<br />
(signed)<br />
Mike JankulakUnknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-62561122315598101672015-06-11T13:32:00.000-04:002015-06-11T13:39:25.452-04:00WDirDiff/Compass data from Buccoo Reef, 2013-presentThis post is part of a series of posts to share the results
of my recent evaluation of data produced by all of the CREWS/CCCCC buoys
over their lifetimes, from 2013 to the present. This post will discuss
the offsets (WDirDiffs) between the wind directions reported by the analog anemometer manufactured by RM Young (RMY) and the sonic wind sensors on Vaisala's Weather Transmitter (WXT). Ideally these offsets should be less than 5° in absolute value. This post will further discuss the raw directions reported by the buoy's Compass.<br />
<br />
For reference, some important milestones in this station's lifetime are as follows:<br />
<ul>
<li>11/27/2013: initial deployment</li>
<li>5/15/2014 - 8/11/2014: station offline due to a power failure</li>
<li>11/12/2014 - 11/13/2014: buoy brought to land for a maintenance operation</li>
<li>2/2/2015 - 2/3/2015: buoy brought to land for a maintenance operation</li>
</ul>
The following graph shows the differences in wind directions reported by the two wind sensors (red, on the left axis) and the raw directions reported by the compass (blue, on the right axis). All directions are reported in degrees of compass but note where the scales are different by a factor of 6x and the zeroes offset, with the WDirDiff axis running on the left from -30° to +30° but the Compass axis running on the right from 0° to 360°. A negative WDirDiff would indicate that the reported WXT wind directions are <i>lower</i> than the corresponding analog anemometer values.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5niGq2ZHHa0bIxPINarNFskiJZp-cO8rczQNmWbWzqiG7m09QL_sSziwDpUVLGF2PZhh_4KJfR5HVHgyWbamvA127QhfcQZhvX-Ui1bvDFVaLSpgu4t_sriXUEI7k64IWM_nYpPcfyoAk/s1600/winddir-buto1-1024.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="156" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5niGq2ZHHa0bIxPINarNFskiJZp-cO8rczQNmWbWzqiG7m09QL_sSziwDpUVLGF2PZhh_4KJfR5HVHgyWbamvA127QhfcQZhvX-Ui1bvDFVaLSpgu4t_sriXUEI7k64IWM_nYpPcfyoAk/s400/winddir-buto1-1024.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Please click on this image to see it in larger form.</i></td></tr>
</tbody></table>
<br />
First of all, note the four different "regimes" of compass directions. They alternate between averages that are roughly 180° offset from one another, with the transition times coinciding with periods when the buoy was believed to have been brought back to land and then redeployed (details below). I am not familiar with CREWS/CCCCC buoy design but I believe these buoys are deployed at the midpoint of mooring lines attached to two anchor points on the ocean floor, and this pattern suggests to me that the Buccoo Reef buoy has on occasion been attached to its mooring in a manner that is 180° twisted from its prior attachment. To my knowledge this is not indicative of any problem, however, no such pattern has been noted at this station's sister buoys (see below) to date. <br />
<br />
The second thing to note from this graph is that the WDirDiffs average over the buoy's lifetime is -18.6°. This is of concern because it falls outside of a range explainable by the specifications of the anemometer (± 5° accuracy) and the WXT (± 3° accuracy). It suggests that one or both of the wind sensors are not properly oriented on the buoy in a manner consistent with correction to magnetic north using the direction offsets measured by the compass. As of this writing it is not known which of the two reported wind directions is likely to be (more) accurate. The WDirDiff averages are slightly different during the different compass "regimes" described above but these differences are within the range of accuracies of the wind sensors and may not be significant.<br />
<br />
The exact statistics of WDirDiff averages and Compass averages per "regime" are as follows:<br />
<ul>
<li>11/27/2013 - 5/15/2014: WDirDiff -19.8°, Compass 205.1°</li>
<li>8/12/2014 - 11/12/2014: WDirDiff -17.7°, Compass 30.0°</li>
<li>11/12/2014 - 2/2/2015: WDirDiff -19.3°, Compass 204.6°</li>
<li>2/2/2015 - 6/9/2015 (present): WDirDiff -17.1°, Compass 32.3°</li>
</ul>
Similar analyses carried out at this buoy's sister stations at Speyside / Angel's Reef, Tobago (ARTO1) and Little Cayman, Cayman Islands (CCMI2) found that the both the ARTO1 and CCMI2 Compass directions were stable throughout their deployment lifetimes to date. At ARTO1 the lifetime WDirDiff average is -11.4°, which suggests that the ARTO1 wind instruments may not be properly oriented although they are not as divergent as the BUTO1 instruments. At CCMI2 the WDirDiffs average through the end of 2014 (after which time WXT wind directions are not available for comparison) is +1.5°, which is entirely reasonable and consistent given the specifications of the two wind sensors.<br />
<br />
The complete analyses for the other WDirDiff/Compass averages, including graphs, may be found at <a href="http://arto1-log.blogspot.com/2015/06/wdirdiffcompass-data-from-speyside.html">this link for ARTO1</a> and at <a href="http://ccmi2-log.blogspot.com/2015/06/wdirdiffcompass-data-from-little-cayman.html">this link for CCMI2</a>.<br />
<br />
(signed)<br />
Mike Jankulak<br />
<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-24636564988694445812015-06-10T15:08:00.000-04:002015-06-10T16:49:40.228-04:00AirT/RH performance at Buccoo Reef, 2013-presentThis post is part of a planned series of posts to share the results of my recent evaluation of data produced by all of the CREWS/CCCCC buoys over their lifetimes, from 2013 to the present. This post will discuss the performance of the analog instruments which measure air temperature (AirT) and relative humidity (RH). These analog reading serve as a basis of comparison for AirT/RH measurements reported by the Vaisala Weather Transmitter (WXT) which also reports wind, barometric pressure and precipitation data.<br />
<br />
At Buccoo Reef the analog AirT/RH sensor lasted 90 days before the RH data went bad on February 25, 2014. [All instruments on a CREWS/CCCCC buoy are intended to produce usable data for an entire year.] The buoy was offline due to a power failure from May 15 to August 11, 2014, and was brought briefly to land on November 12-13, 2014 and on February 2-3, 2015. After the November 2014 maintenance operation both the AirT and RH data were bad, and as of this writing they are still bad. <a href="http://buto1-log.blogspot.com/2015/02/february-2015-maintenance-buccoo.html">An ear<span id="goog_134658836"></span><span id="goog_134658837"></span>lier post in this blog</a> suggests that the AirT/RH sensor was "reinstalled" during the February 2015 maintenance operation and was at that time "working properly," but there is no hint of good data in the hourly data records from this time.<br />
<br />
The following are graphs of AirT (top, in °C) and RH (bottom, in %) from the Buccoo Reef buoy's lifetime, from 2013 to the present. Values reported from the analog sensor under discussion are in blue and values from the WXT are in red. Data are shown through June 9, 2015.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEht6Z5GXUlkYWMOqTzX2-lKy-HeswxaEIIl7B-piSKEAyjFviVL_wZJLZUaCa0iRYEM8ZPeJSNFjgRpcYYK-Y4ZAjp4qazkG9avv9a2sA0O70P5dIoGhwiNBqwmQCCliNltPZraLaNJb7su/s1600/airtrh-buto1-1024.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="312" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEht6Z5GXUlkYWMOqTzX2-lKy-HeswxaEIIl7B-piSKEAyjFviVL_wZJLZUaCa0iRYEM8ZPeJSNFjgRpcYYK-Y4ZAjp4qazkG9avv9a2sA0O70P5dIoGhwiNBqwmQCCliNltPZraLaNJb7su/s400/airtrh-buto1-1024.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Please click on this image to see it in larger form.</i></td></tr>
</tbody></table>
<br />
Based on this data record the BUTO1 (Buccoo Reef) buoy's AirT/RH sensor performed reasonably well for 90 days out of the buoy's 469 operational days, or about 19% of the time. Its longest stretch of proper operation was 90 days, or about 3.0 months.<br />
<br />
Similar analysis performed on this buoy's sister stations at Speyside / Angel's Reef, Tobago (ARTO1) and Little Cayman, Cayman Islands (CCMI2) found that the ARTO1 instrument performed reasonably well for 181 days out of the buoy's 557 operational days, or about 32% of the time, and the CCMI2 instrument performed reasonably well for 376 days out of the buoy's 506 operational days, or about 74% of the time. The ARTO1 sensor's longest stretch of proper operation was 181 days, or about 6.0 months, and the CCMI2 sensor's longest stretch of proper operation was 226 days, or about 7.4 months.<br />
<br />
The complete analyses for the other AirT/RH sensors, including graphs, may be found at <a href="http://arto1-log.blogspot.com/2015/06/airtrh-performance-at-speyside-angels.html">this link for ARTO1</a> and at <a href="http://ccmi2-log.blogspot.com/2015/06/airtrh-performance-at-little-cayman.html">this link for CCMI2</a>.<br />
<br />
(signed)<br />
Mike Jankulak<br />
<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-62948177260968716492015-06-05T15:26:00.000-04:002015-06-10T16:50:06.336-04:00EXO Sonde performance at Buccoo Reef, 2013-presentThis post is part of a planned series of posts to share the results of my recent evaluation of data produced by all of the CREWS/CCCCC buoys over their lifetimes, from 2013 to the present. This post will discuss the performance of the EXO Sondes, which were deployed to collect sea temperature and salinity data but are also capable of monitoring other 'water quality' parameters such as turbidity, algae, fDOM, pH and DO.<br />
<br />
At the Buccoo Reef buoy (BUTO1), performance by the EXO Sonde has been generally poor. The Buccoo EXO was first deployed on November 27, 2013 and this analysis is based on data collected through June 4, 2015. Although this period spans a total of 554 days, BUTO1 experienced one prolonged outage in the summer of 2014 and a few shorter maintenance operations that brought the buoy temporarily to land, so that the actual length of deployment over this period was only 464 days, or about 15 months' worth.<br />
<br />
Here is a graph of sea temperature (°C, in blue) and salinity (PSU, in red) from BUTO1, plotted against decimal year:<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgq1AKDQHoMdgK5pGcNH46TkcwvxkBenTbSBQUss8ERSlQ0e0BzqGRgEjHYbH2MRDTG-zKpy1QN1Zb0MZ19ldbJQbCxWIhB7ZJjqfIOT_3bZk1eQoSXWRtPEUKmfh3uW-QDeOmA58j9Y0Tq/s1600/buto1-exo-lifetime-1.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="312" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgq1AKDQHoMdgK5pGcNH46TkcwvxkBenTbSBQUss8ERSlQ0e0BzqGRgEjHYbH2MRDTG-zKpy1QN1Zb0MZ19ldbJQbCxWIhB7ZJjqfIOT_3bZk1eQoSXWRtPEUKmfh3uW-QDeOmA58j9Y0Tq/s400/buto1-exo-lifetime-1.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Please click on this image to see it in larger form.</i></td></tr>
</tbody></table>
<br />
Over the course of the last year and a half, the EXO Sonde at Buccoo has had six periods of time during which the EXO could be said to have produced reasonable sea temperature and salinity data:<br />
<ul>
<li>Nov 27, 2014 to Jan 29, 2014 (63 days, after which SeaT and Sal both go bad)</li>
<li>Mar 19, 2014 to May 15, 2014 (57 days, after which the buoy loses power)</li>
<li>Nov 13, 2014 to Jan 17, 2015 (65 days, after which Sal goes bad)</li>
<li>Feb 3, 2015 to Feb 12, 2015 (9 days, after which Sal goes bad)</li>
<li>Mar 17, 2015 to May 2, 2015 (46 days, after which Sal goes bad)</li>
<li>May 12, 2015 to June 4, 2015 (23 days and counting)</li>
</ul>
Based on these statistics the EXO's conductivity probe, which reports both sea temperatures and conductivities (from which salinities are calculated), has performed reasonably well for 263 days out of the buoy's 464 operational days, or about 57% of the time.<br />
<br />
A similar analysis performed on this buoy's sister station at Speyside / Angel's
Reef, Tobago (ARTO1) found that that EXO performed reasonably well for 190 days out of the buoy's 552
operational days, or about 34% of the time. The complete analysis for that EXO may be found <a href="http://arto1-log.blogspot.com/2015/06/exo-sonde-performance-at-speyside.html">at this link</a>.<br />
<br />
(signed)<br />
Mike Jankulak<br />
<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-22168012892284423742015-05-27T09:04:00.002-04:002015-05-27T09:04:27.043-04:00May 2015 maintenance - Buccoo The Buccoo Buoy was inspected on 12 May 2015. While the anchor ropes and metal base required cleaning, the sonde, probes and protective case were relatively unfouled. Three probes required the copper coating to be replaced.<br />
<br />
A calibration was not conducted on this trip, and the sonde was cleaned and re-installed.<br />
<br />
Data from the Sontek ADP was collected. The unit seems to be working fine and the data looks good.<br />
<br />
The status of RMY RH sensor remains the same.Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-35958259757970876572015-05-27T08:53:00.001-04:002015-05-27T08:53:09.893-04:00March 2015 maintenance - Buccoo BUTO1 was inspected ans serviced over the period 14-17 March 2015. During this period
the exterior of the buoy (floating base and metal supports) were cleaned
of barnacles and other fouling. All instruments were inspected, cleaned
and replaced. During this period the sonde was out the water for 3 days. <br />
<br />
The anode is badly eroded and should be replaced.<br />
<br />
The RMY temp/RH installed the previous month was not collecting data. The unit was inpsected and reinstalled, but the problem persists. On further correspondence with C-ARMs two other options will be looked at to correct the problem.<br />
<br />
<br />
The Sontek ADP was also deployed on this trip.<br />
<br />
Cellular and RF communications were confirmed from
multiple sources.<br />
<br />
The next visit is scheduled for the end of May 2015 Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-17502333119765404702015-02-10T08:28:00.004-04:002015-02-10T08:30:27.976-04:00February 2015 maintenance - BuccooOver the period 2-3 February 2015 the Buccoo CREWS was brought to shore for a follow-up maintenance. During this period
the exterior of the buoy (floating base and metal supports were cleaned
of barnacles and other fouling. All instruments were inspected, cleaned
and replaced. The floating base and metal supports were painted with anti-fouling paint to control relatively high rate of fouling (mianly by barnacles) on the buoy. Two of the anodes on the support base had to be replaced.<br />
<br />
The RMY temp/RH , conductivity/temp probe and ch-a probe were also re-installed and are working properly.The relay arrangement on the ASC was not restored to "factory setting"<br />
<br />
Cellular and RF communications were confirmed from
multiple sources.<br />
<br />
The next visit is scheduled for the end of February 2015 Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-32974367069700939942014-12-02T11:08:00.002-04:002014-12-02T11:08:34.501-04:00November 2014 Annual service and repairDuring the 9-14 Dec period Jon Fajan was invited over to conduct an annual maintenance and repair of two Tobago CREWS. During this period the exterior of the buoy (floating base and metal supports were cleaned of barnacles and other fouling. All instruments were inspected, cleaned and replaced. Two months prior (September) the Buccoo CREWS was not transmitting data. The cause was thought to be a power surge, which triggered a power failure. A relay was by passed and the power restored resulting in the transmission of data from the CREWS. The CREWS was redeployed on 13 Nov 2014 but due to overcast and rainy conditions we were unable to reset the ASC because the solar
panels are only putting out about 13V today. Removing and replacing the
positive wires from the battery did not reset. The power was put back on the
bypass and an attempt will be made to reset during the service visit to repaint
the hull in the very near future. If at that point the voltage from the panels
exceeds 13.5V and the relay still does not reset –
the ASC (it would have failed within the 1 year of deployment) may have to be checked by YSI. The buoy was deploy without the RMY temp/rh sensor and
without the turbidity and chl-a EXO2 sensors as these are all in need of
service. Cellular and RF communications were confirmed from
multiple sources. <br />
<br />
Previous basic maintenance was also conducted in August 2014, July 2014, June 2014, April 2014, February 2014. Inspections were inconsistent due to team changes, sea conditions and other logistical constraints. Ideally Buccoo should be monitored twice monthly due to the high rate of fouling, however this is not logistically possible.<br />
<br />
Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-24050148626099367952014-05-05T14:53:00.000-04:002014-05-05T14:53:00.724-04:00April 2014 scheduled maintenanceThe Buccoo Reef CREWS given a basic maintenance service on 24st April
2014. Moderate barnacle and algal fouling was noted, but less severe than the last time. No obvious physical damage was noted, but barnacles were noted to have attached to the top of the EXO2 at the connections of the cables. Some fouling "crud" was also noted on the female connector then de-coupled from the EXO2. The copper coating remains intact and holding. The failure of the Turbidity probe to
pass the QC test remains unresolved (the same issue exist for ARTO1),
even though it all seems right during the cal. Recommended action is a
firmware upgrade.<br />
<br />
Possible error with barometric readings.
Pressure ranges from 1013-1015 millibar throughout the day. A 1millibar
change suggest a 10m displacement.Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-49547423385031896372014-03-25T21:34:00.001-04:002014-03-25T21:34:29.732-04:00March 2014 Scheduled MaintenanceThe Buccoo Reef CREWS (BUTO1) was serviced on 19/03/2014 after several months of basic maintenance. Rough seas prevents schedules maintenance in December/January.<br />
<br />
Pre-cal CTD<br />
<br />
Depth: 1.05m <br />
Temperature: 27.23<br />
Conductivity: 56155<br />
Salinity: 35.5<br />
<br />
Mooring lines, the buoy and the hardware attached to the buoy remained intact and with no noticeable damage. Mooring lines and the buoy were heavily fouled with green filamentous algae and sessile barnacles. The anchors remained intact with no cracks or weaknesses noticed. The eastern subsurface buoy has shifted up to below the surface of the water, and will be adjust on next visit.<br />
<br />
The EXO2 was heavily fouled primarily with sessile barnacles at both ends. The fouling was to the extent that it prevent the opening of the unit from the protective casing and the release of the probes from the EXO2 base unit. Most of the copper coating surrounding the probes had been oxidised but no physical damage was noticed on the sensors. The probes were thoroughly cleaned of all barnacles, algae and other encrustations. All debris removed from the threading and krytox gel reapplied to all ports prior to reconnection to the base unit. On recalibration it was noted that the conductivity/temperature probe
was faulty (during calibration it registered temperature of 1.xx e-9 and
conductivity readings of 96500 in the conductivity standard) and has
been replaced with a new probe. The faulty probe has been sent to YSI
from examination. The new probe passed calibration process. A QC result
was generated during the TSS calibration process for reasons
undetermined. This also occurred during the first installation of the
CREWS.<br />
<br />
Buccoo is a high fouling area and as a result more regular checks to BUTO1 will be made. Basic checks will be made twice per month to clean any fouling and
recalibration exercises conducted monthly as best as possible.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGf9aB540uAweB7nakkEFdyVk8MJgI1wX4RnZczmLUqnjrITp-M35gh1y7vZMbWKnD4rbJ7OVZgb5OeyHMSl3v3WZ_REcrsU6t-JuWDZtAGSfXmR5toMUJwPFr0Ij8sWzqbIy3OrjoCJk/s1600/20140319_145936.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGf9aB540uAweB7nakkEFdyVk8MJgI1wX4RnZczmLUqnjrITp-M35gh1y7vZMbWKnD4rbJ7OVZgb5OeyHMSl3v3WZ_REcrsU6t-JuWDZtAGSfXmR5toMUJwPFr0Ij8sWzqbIy3OrjoCJk/s1600/20140319_145936.jpg" height="240" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">barnacles settling at junction between protective cap and EXO base inhibiting smoothing opening of unit</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgeu_3lcfUG5ZKdFATSH9mKcFG9WWdzGQ_bX8rt3IdgiNzoEhQPxLXMK-GMVntqvNalf-y2JCRCjeHUaSSzEYdD2XRDiGakhXJ9dojmTzPUyoAmTBOALgPP7rbXqGpO1pOAfJ5lADbOYX0/s1600/20140319_151254.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgeu_3lcfUG5ZKdFATSH9mKcFG9WWdzGQ_bX8rt3IdgiNzoEhQPxLXMK-GMVntqvNalf-y2JCRCjeHUaSSzEYdD2XRDiGakhXJ9dojmTzPUyoAmTBOALgPP7rbXqGpO1pOAfJ5lADbOYX0/s1600/20140319_151254.jpg" height="320" width="240" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Fouling within protecting casing</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBIMvHUDMfVg8VYVVH1UGurn2i1iOgfZEAnt6E4pvHsyOPVwWZbeEqwsV3S59cqLQdx5lNQHiPtvSdu1sftF7xM0J5InF4a9rLDCrYDVe-eZNzcLIHf6qe6OoZ97ratInItfIMA8Fw09Q/s1600/DSCF2028.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBIMvHUDMfVg8VYVVH1UGurn2i1iOgfZEAnt6E4pvHsyOPVwWZbeEqwsV3S59cqLQdx5lNQHiPtvSdu1sftF7xM0J5InF4a9rLDCrYDVe-eZNzcLIHf6qe6OoZ97ratInItfIMA8Fw09Q/s1600/DSCF2028.jpg" height="240" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">BUCO1 anchor</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibRDmkn9atZGjPqnKitEBCLL0qoWM16BUFrdHb1w5zmBPwOn5_CSHmeqrDVeniKLQt5SCirf3and-7wvm37z_CSjgotYVe0p_lOkd2AsnrIt_10trDbOn6BWzYj1KTPk7BR3pmNpLjJvo/s1600/20140319_151344.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibRDmkn9atZGjPqnKitEBCLL0qoWM16BUFrdHb1w5zmBPwOn5_CSHmeqrDVeniKLQt5SCirf3and-7wvm37z_CSjgotYVe0p_lOkd2AsnrIt_10trDbOn6BWzYj1KTPk7BR3pmNpLjJvo/s1600/20140319_151344.jpg" height="320" width="240" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Copper coating deterioration </td></tr>
</tbody></table>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0deIO5A2CdLJTe8SEKBQMJ0-mJe0WMm-AtZaJfHYZPjwcMFa1e_-XixOvpIrT_05UR2f84ualArsoMlftXZkQDsUjHIDdccQoEeFnNnWb4wQ1YoUGATz_G00P6LA8TDsN9-4sSDItG8U/s1600/20140319_145917.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0deIO5A2CdLJTe8SEKBQMJ0-mJe0WMm-AtZaJfHYZPjwcMFa1e_-XixOvpIrT_05UR2f84ualArsoMlftXZkQDsUjHIDdccQoEeFnNnWb4wQ1YoUGATz_G00P6LA8TDsN9-4sSDItG8U/s1600/20140319_145917.jpg" height="240" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Range of sizes of barnacles colonising EXO2</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPAi1bnzsmNpa8VJx83b8WuX2Ea0p07-ylBQJhAwqi7tIkaQGlcftLbb2BB5_mFY-75N-UcwxCJHY-fHPlLRGvwjYahBdlKbr87kniB0YWeZaZAlqUmNch9Wj5zGBaJ5mJNSnxOsLIh5Q/s1600/20140319_151804.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPAi1bnzsmNpa8VJx83b8WuX2Ea0p07-ylBQJhAwqi7tIkaQGlcftLbb2BB5_mFY-75N-UcwxCJHY-fHPlLRGvwjYahBdlKbr87kniB0YWeZaZAlqUmNch9Wj5zGBaJ5mJNSnxOsLIh5Q/s1600/20140319_151804.jpg" height="320" width="240" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Deterioration of copper coating on probes</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrUq3reT1fqxvYPyoOk33FaxzMpT_3EQuc2yFdfi1nt9n5KOWFSQz61l8UoA4Yd7rpgLOgvLgoFpbMkdNRRdhyms8IJSjFArJAZlr3AlMq8nHQBMvoFyKJxejGpg7K0_QFVKDxjjMJA_8/s1600/DSCF2024.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrUq3reT1fqxvYPyoOk33FaxzMpT_3EQuc2yFdfi1nt9n5KOWFSQz61l8UoA4Yd7rpgLOgvLgoFpbMkdNRRdhyms8IJSjFArJAZlr3AlMq8nHQBMvoFyKJxejGpg7K0_QFVKDxjjMJA_8/s1600/DSCF2024.jpg" height="240" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Tough algal mat and barnacles covering protective cover and probes</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXPJveiIbI64ue5amUDD7WbcQYvQ8jO51iLIQ5t94U6oNRc9IXUTPfmU0ZYmIujqS2lK63sClmq699uUGzFPtMxbEohKysb0rshLuGLkv6axCZFg7k2Su2x1pMH2UXS0T4Zgrf_6k5gkU/s1600/DSCF2025.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXPJveiIbI64ue5amUDD7WbcQYvQ8jO51iLIQ5t94U6oNRc9IXUTPfmU0ZYmIujqS2lK63sClmq699uUGzFPtMxbEohKysb0rshLuGLkv6axCZFg7k2Su2x1pMH2UXS0T4Zgrf_6k5gkU/s1600/DSCF2025.jpg" height="240" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Settlers on top of EXO2</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjK1IlY7dLsj2uMxkLc782ni8HXP6wXtjmx2bY7u4VuxDtxeGg4WOmmnq7ebv8900uSBKBmZjqwf5cKuygpb8a7FaoaZ9Qc0Ok8sPUeSHZRtbNKTbc9gE44sGE0-iS54HBi0JPWiLvKlzw/s1600/DSCF2043.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjK1IlY7dLsj2uMxkLc782ni8HXP6wXtjmx2bY7u4VuxDtxeGg4WOmmnq7ebv8900uSBKBmZjqwf5cKuygpb8a7FaoaZ9Qc0Ok8sPUeSHZRtbNKTbc9gE44sGE0-iS54HBi0JPWiLvKlzw/s1600/DSCF2043.jpg" height="240" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Fouling on CREW buoy</td></tr>
</tbody></table>
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<br />
<br />Unknownnoreply@blogger.comtag:blogger.com,1999:blog-1575313278095621984.post-27417774198651837332013-11-23T12:00:00.000-04:002014-01-23T11:42:28.004-04:00Welcome to the Maintenance Log for the BUTO1 CREWS station!This station was installed on November 23rd, 2013. It is an anchored buoy located west and north of the western tip of Tobago not far from Buccoo Bay, and is owned and operated by Trinidad and Tobago's Institute for Marine Affairs (IMA) in collaboration with the Coral Reef Early Warning System (CREWS). CREWS handles the data stream and ecoforecasting for this station, and operates out of the National Oceanic and Atmospheric Administration's (NOAA's) Atlantic Oceanographic and Meteorological Laboratory (AOML).<br />
<br />
We are informally referring to the buoy as BUTO1 (Buccoo Reef, Tobago the 1st) although the National Weather Service in the US will also be giving it an all-numeric buoy designation.<br />
<br />
For more information about IMA, please visit its website at this location: <a href="http://www.ima.gov.tt/">http://www.ima.gov.tt/</a><br />
<br />
The new buoy's exact coordinates are<br />
<blockquote class="tr_bq">
N 11° 11.095'<br />
W 60° 50.870'</blockquote>
<br />Unknownnoreply@blogger.com