Seaglider142
Seagliders: Mission Complete
Submitted by graya on Sat, 06/28/2008 - 14:48.SG141 received a final calibration CTD cast before its recovery on 27 June, confirmed aboard the R/V Saemundsson at 14:51 UTC. SG140 received its final calibration CTD cast and was recovered on 28 June, by 14:45 UTC. SG142 is presumed lost.
The science team on the Saemundsson will do more CTDs during their cruise, and are additionally acting as a vessel of opportunity, launching a few floats in the area for a French research project.
Seagliders: SG142 Search Update
Submitted by graya on Thu, 06/26/2008 - 19:29.Around 25 June @ 22:30 PDT, the field team called in to say that they had finished the NE arm of the search grid and had reached the center of the bowtie, with nary a peep from SG142. They called again on 26 June @ 12:00 PDT to report that they had proceeded through the NW arm and continued to the southern half of the search grid -- and still no sign of the glider. They will finish up the search grid by nightfall, and then (assuming there's no reply from SG142) they will abandon the search.
Seaglider 142, Where are you?
Submitted by graya on Wed, 06/25/2008 - 07:00.Seaglider 142 made its last call home on 24 June 01:34 (UTC). So far, there is nothing in the logs to suggest that something was going wrong. It is a mystery that will hopefully be solved by finding the glider via accoustic tracking.
The shore-side crew have identified the 4 possible scenarios that are most likely:
1) It's stuck on the bottom. It could be snagged on something, or it might have suffered a VBD failure. (The VBD, or "Variable Buoyancy Device" is the rubber balloon outside the pressure hull that can be filled with oil to change the glider's buoyancy.)
Glad I didn't take the day off...
Submitted by graya on Wed, 06/25/2008 - 03:21.Because today wasn't going to let me off, anyway. SG142 didn't call home last night, so from the moment I got in until I packed everything up to go home I've been poring over the last logs and running through all sorts of scenarios to help the search team. They're going out on the R/V Saemundsson, so they probably won't be functional (read: they'll be hurly) for the first 24 hours, and they won't have an ADCP to tell them what the currents are doing or web access to see the latest plots of the glider locations and status -- and the ship's email arrives and sends only 4 times a day.
Glider 142, dive 385
Submitted by blmadmn on Tue, 06/24/2008 - 02:00.Glider 142 dive 385 ended on 2008/6/24.
SG142 files
New/Updated files as of 01:59:56 24 Jun 2008 UTC conversion
Click the images below for bigger versions:Preparing to Recover the Remaining Seagliders
Submitted by graya on Mon, 06/23/2008 - 23:05.While SG143 was recovered on 3 June 2008, shortly after Float 48, the remaining three Seagliders began a new survey pattern on the eastern flank of the Reykjanes ridge:
SG140 is executing a large bowtie pattern, and SGs 141 and 142 are repeating a 20-km bowtie: sg141 performing north-south transects on the sides of the bowtie, sg142 performing east-west transects and drawing an hourglass.
SG142 files
New/Updated files as of 20:52:59 23 Jun 2008 UTC conversion
Click the images below for bigger versions:Glider 142, dive 384
Submitted by blmadmn on Mon, 06/23/2008 - 20:40.Glider 142 dive 384 ended on 2008/6/23.

