Though these are somewhat delayed, the vessel's positions over the last couple of days follow:-
17 May 2010 19:46z Hdg 171.2 Spd 00.6 3°03'54"N 30°58'24"W
17 May 2010 17:55z Hdg 136.8 Spd 01.7 3°02'55"N 30°57'36"W
17 May 2010 09:05z Hdg 265.9 Spd 11.4 3°07'19"N 30°50'29"W
17 May 2010 07:21z Hdg 060.2 Spd 07.4 3°04'57"N 30°56'02"W
17 May 2010 05:40z Hdg 098.1 Spd 06.9 3°05'06"N 31°03'43"W
16 May 2010 20:52z Hdg 097.0 Spd 05.6 3°03'28"N 31°02'06"W
16 May 2010 19:02z Hdg 126.4 Spd 01.7 3°03'43"N 31°01'53"W
16 May 2010 17:21z Hdg 341.6 Spd 09.2 3°00'25"N 30°57'59"W
16 May 2010 08:32z Hdg 067.6 Spd 02.0 3°04'31"N 31°01'57"W
16 May 2010 06:49z Hdg 086.6 Spd 01.5 3°03'53"N 31°03'40"W
15 May 2010 20:10z Hdg 107.2 Spd 01.7 3°03'44"N 31°03'06"W
15 May 2010 18:33z Hdg 254.5 Spd 01.3 3°03'51"N 31°01'32"W
EDIT:: Positions & graphic updated 18/0700z
Some of the times associated with positions previously posted were actually Brazilian Standard Time and have now been corrected to UTC. As you will note, where the vessel is at any given time doesn't imply that anything in particular was going on there. Some positions were as a result of the launching or recovering of AUVs, or while the AUVs were doing their thing, bottom beacons were being placed for the next area to be searched.
When the "Anne Candies" was towing her sidescan sonar, it was easy to plot where she had been, and this is not the case with the "Seabed Worker" operation.
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auv-ee;
Thanks for that comprehensive description on the reflection / refraction and ducting possibilities of the 37.5kHz ultra-sound signal
mm43