Dive Number: 3955
December 14, 2003
Port Observer: Peter Countway
Starboard Observer: Kristy Henscheid
14:03 Submerged, many jellyfish in surface waters.
14:08 110 m
14:13 260 m, Beginning “drive” toward site bottom target, heading 55–65°
14:23 500 m, Tested Sipper and temp probe for function, all ok.
14:31 725 m, heading 90°
14:39 Switch to sub-bottom transducer.
14:43 1000 m
14:58 1500 m
15:15 2000 m, 70 m from target, driving East to avoid Bio-Vent
15:30 2400 m, 1.8°C external temp.
15:32 Arrival at bottom, attaining neutral buoyancy.
15:38 Begin search for elevator, heading 180°.
15:43 Located INSECT Elevator, X 4698, Y 78037, 2503 m.
15:48 Begin tapes.
15:56 Attaining neutral buoyancy after picking up the INSECT Elevator.
15:59 Moving to TICA with elevator, heading 310–320.
16:05 Dumbo Octopus.
16:13 Dropped elevator near Tica, within several meters of DLK INSECT.
16:26 Spotted Shank colonizers near DLK INSECT X 4576, Y 78159, 2513 m, began colonizer collection.
16:31 Finish collection of Shank colonizers (A-E), did not find F.
16:52 Found Riftia baby traps (all collected), and Protist Cans (both collected), X 4590, Y 78131, 2511 m 3-chip at 16:52 and digital stills at 16:53.
17:13 Fly-over main Riftia clump at Tica. Fired Niskin bottle, X 4574, Y 78161, 2512 m
17:21 Began work at INSECT, X 4581, Y 78159, 2513 m, set up for Sipper samples at the end of each copper probe.
17:24 Sipper sample #1 collected at starboard-side INSECT probe (Red), temperature = 10–12.4°C in Riftia tube.
17:33 Starboard-side electrode knocked out of tube.
17:36 Sipper sample #2 collected at port-side, INSECT probe (Yellow), temperature = 7–8°C in Riftia tube.
17:41 Sipper sample #3 collected at the base of the Riftia clump in region of highest temperature flux = 19.5°C.
17:48 Digital stills and 3-chip survey of Riftia clump and DLK INSECT ends; tapes changed.
17:55 Collected Riftia from starboard (Red) DLK INSECT probe, stowed in forward chamber of Bio-Box.
17:57 Collected Riftia from port (Yellow) DLK INSECT probe, stowed in forward chamber of Bio-Box.
17:59 Copper tubes folded back on top of the INSECT.
18:05 Begin attaching floats to DLK INSECT.
18:12 Positioning elevator and INSECT for release.
18:24 INSECT package sent to surface, X 4575, Y 78157, 2112 m.
18:26 Began transit to Q-Vent for Alvenellid collection (approx. 600–700 m).
19:10 Arrived Q-vent, X 4397, Y 78767, 2505 m, pilot informed science that power was running low, approx. 40 minutes remaining in dive, positioning for temp/Sipper survey.
19:21 Began temp survey, Sipper #4 collected.
19:25 Temp probe bent against substrate into an L-shape, pilot attempted a fix, but was unsuccessful, time running low, aborted temp survey and Alvinellid sampling due to damaged probe.
19:33 Began survey for ASU pancake deployment at Q-vent, collected small sulfide, but temp of scar (95–150°C) wasn’t suitable for placement of unit.
19:36 Second sulfide chimney probed, approx. 250°C water, Sipper sample #5 collected, sulfide collected in small Bio-Box.
19:39 Sipper sample #6 collected from scar.
19:40 ASU unit deployed “Four Play.”
19:43 Temp from top of unit (33°C), Sipper #7 (only time to pump for 30 sec.).
19:44 Temp from side of unit (48°C), sipper #8 (only time to pump for 30 sec.).
19:45 Out of time, moving to drop weights.
19:47 Weights away.
|Copyright University of Delaware, November 2003|