APPENDIX XVIII

1995 Science Operations
Advanced Tethered Vehicle

DSV TURTLE
DSV SEA CLIFF

• 28 April to 14 May: Southern California
• 9 to 16 August: Southern California
• 23 August to 13 September: Juan de Fuca Ridge
• 15 to 26 September: Mendocino Ridge
• 1 to 11 October: Juan de Fuca Ridge
• 26 to 28 October: Southern California

Whale_Fall Communities
Catalina Basin

29 April - 8 May

• Dr. Craig Smith (University)
• Investgated significance of whale-fall communities as dispersal stepping stones for sulfide-dependent spicies
• Recovered 36 vertebrate segments, 41 core and scoop samples, 62 hours of video recordings, 550 still frames
  • ATV: 7 dives (69 hrs)
  • TURTLE: 3 dives (25 hrs)

Deep-Sea Brittlestar Fish
San Diego Trough:

8 May - 14 May

• Dr. Gordon Hendler (Natural History Museaum of Los Angles)
• Interpretion of Brittlestar behavior pattern
• Recovered over 100 specimens, 65 hours of video, 950 still frame
  • ATV: 5 dives (59 hrs)
  • TURTLE: 4 dives (23 hrs)

Submarine Canyon Studies
La Jolla Canyon

9 - 16 Aug
26 - 28 Oct

• Drs Paul Dayton and Eric Vetter (Scripps Institution of Oceanography)
• Study to Assess the Importanc eof Submarine Canyons as Hot-spots of Secondary Production
• Collected 92 tube and box core samples, 9 Niskin samples, 81 hours video, 1650 stills
  • ATV: 11 dives (76 hrs)
  • SEA CLIFF: 9 dives (35 hrs)

Hydrothermal Microhabitatas
Juan du Fuca Ridge:

23 Aug to 13 Sep
1 Oct to 10 Oct

• Dr Cindy Lee Van Dover (University of Alaska)
• A snap shot approach to sampling dominant invertibrate
• Collection of 3 Niskin samples, 22 recruitment arrays, 52 hours of video, 2700 still photes, 14 boxes of invertebrates
• - ATV: 6 dives (39 hrs)
• - SEA CLIFF: 7 dives (55 hrs)

Mendocino Ridge Studies
Mendicino Ridge:

14-26 Sep

• Dr Martin Fisk (Oregon State University)
• Ridge's Impact on the Surface Circulation of Pacific Ocean
• Conducted 120 hours of SEA BEAM, 92 rock samples, 22 biological samples, 1500 still frames, 52 hours of video
  • ATV: 4 dives (51 hrs)
  • SEA CLIFF: 4 dives (33hrs)

Summary of Operations

• Total days on station: 40 days (4 lost due to weather)
• Depth of opersations: 923 - 10,500 feet
• TURTLE dives: 7 dives/48 hours
• SEA CLIFF:dives: 20 dives /123 hours
• ATV dives: 33 dives/294 hours (longest: 37 hours)
• Total hours ofbottom time: 215 hours

Recent Military Operations

• Coast Guard mishap investigation
• Three high value R&D Recoveries
• F-14 and F-18 air Mishap Boards
• SEAL Delivery Vehicle (SDV) search in Hawaii
• Training Minefield Surveys
  ** Over $60 million of recovered hardware
  ** Over 500 hours of ROV bottom time

Science Related Initiatives
(including WHOI/MPL support)

• Lighting studies/upgrade for ATV and SCORPIO ROV's
• SEA BEAM post processing system
• Integrated data logging
• ATV tether and telemetry upgrades
• Tracking upgrades (WINPHROG/N-916)
• Video frame grabber
• MARSAT E-mail