Cruise Planning Questionnaire

    Vehicle(s) required:
    Name of ship for ROV ops:
    Ch Sci:
Jeff Karson
Duke University
Division of Earth & Ocean Sciences
Box 90230
Durham, NC 27708-0230

Division of Earth & Ocean Sciences
Room 103, Old Chemistry Bldg.
Duke University- West Campus
Durham, NC 27708-0230
    POC / contact info:
Departure port & date:March 12, 1999
    Distance to first station:
    Number of stations:
    Distance between stations:
    Total days on station:
Arrival port & date:April 12, 1999
Op area:Hess Deep
Lat/Lon:2N, 101W
Depth range:4000-1500 m
    Will the vessel be operating within 200 NM of a foreign country?
    Which country?
    Are visas or special travel documents required?

Funding agency:

Grant or contract number: 96-33725

    Science objectives/activities planned:
Imaging, Observation, and Sampling of the uppermost oceanic crust exposed in the walls of the Hess Deep Rift. Imaging will be done with 1) DSL-120 side-scan sonar and 2) ARGO II. Direct observations and sampling will be accomplished with DSRV ALVIN. The study area will include a narrow, EW strip (about 3km x 30 km) along the top of the rift wall. We wish to deploy a single, large transponder net (16-20 transponders) when we first arrive at the site and then to recover them as the work in completed across the area. We plan only about 3 days of DSL-120 surveying, followed by an initial ARGO II program of about 4 days in which we will focus on a number of relatively small (couple 100 m square) areas for which we want >100% coverage that will enable us to make digital mosaics. The ALVIN program of 15 dives will target areas identified in the side-scan and digital image data. We will make mostly upslope transects from about 4000 to 1500 m on most dives, but will also plan a few dives to travel along the slope at m
ore or less constant depths. We will expect to be doing fairly extensive sampling and using the "Geocompass" device as in past work. These will require that ALVIN pilots are very proficient in these operations. We hope to use ARGO II for short night-time surveys at least some nights. We are not planning additional night time programs in order not to over-tax the technical staff. We will plan to be able to dredge in the event of a major equipment failure-- but this will be a last resort.
(Please see rough cruise plan attached)

WHOI shipboard scientific instrumentation desired:
    Rock Dredge
Pinger for Wire Use

Is nighttime work anticipated on this cruise?

    Critical MET sensors:
    Critical CTD sensors:

Do you need Seabeam? (AT and KN only) Yes

Long baseline (LBL) transponder navigation? Yes No. of xpndrs/nets: 16-20 (see above)
Ultra-short baseline (USBL) navigation?
Doppler/GPS navigation?

Will you be using portable science vans? No How many:

Science Van #1
Science Van #2
Science Van #3

Anticipated standard oceanographic cable use:

Instrument Weight(s)
Maximum Depth
    Conducting hydro
    Steel hydro
    Steel trawl
rock dredge
6000 m
    .681" fiber optic
4000 m
    Do you require slip rings?
NoNumber of conductors:
    Do you need non-standard wire?
NoIf so, what type?
    Do you need a traction winch?
Will you be bringing any equipment (winches, blocks, etc.) that lowers equipment over the side?

If yes, please provide details:
Will there be special requirements for:

    Electrical power
    Equipment handling
    Inter/intraship communications
    Science stowage

If yes to any of the above, please identify: We anticipate a substantial volume of rock samples. Once packaged, these may need to be stowed.

Will any of the following items be used on board?

    Explosive devices
    Portable air compressors
    Flammable gases
    Isotope van

Will hazardous material be used aboard, or deployed by an ROV? No

What measures or plans have been made a) in the event of a spill, and b) for the removal and/or disposal of these materials at the completion of the cruise?

Vehicle equipment required:Check one or both:
Major water samplers
Large capacity slurp samplers
Small capacity slurp samplers
Bio collection boxes
Push corers
Scoop nets
High temperature probe
Low temperature probe
Heat flow probe
Portable CTD
Digital Still Camera
Search Sonar
Profiling Sonar
Rock Drill (Jason only)
Video Duplication (Jason)
    Other vehicle-related equipment (list):
    Science equipment to be installed on vehicle:
We will require this instrument on all dives. We would prefer to have the output of the Geocompass both recorded by the data logger and displayed on the video record (as we have done in past dive programs). WHOI has all specifics on the Geocompass.
    Electronic equipment used in the ALVIN personnel sphere:
digital cameras
lap-top computers
    Other comments and information:
Tentative Cruise Plan:

Hess Deep Cruise Plan
(revised 1/19/99)

Cruise Day Date DOS Activities

1. March12 Begin transit (noon?)
2. 13 transit
3. 14 transit
4. 15 transit
5. 16 1. Arr. Site (noon?); deploy transponders
6. 17 2. deploy/survey transponders
7. 18 3. Begin DSL-120 Survey
8. 19 4. DSL-120 Survey
9. 20 5. DSL-120 Survey
10. 21 6. 0.5 day change-over; Begin Argo Survey
11. 22 7. Argo Survey
12. 23 8. Argo Survey
13. 24 9. lay day- Argo/Alvin change-over
14. 25 10. Alvin Dive 1
15. 26 11. Alvin Dive 2
16. 27 12. Alvin Dive 3
17. 28 13. Alvin Dive 4 NIGHT TIME PROGRAM:
18. 29 14. Alvin Dive 5 short Argo surveys when
19. 30 15. Alvin Dive 6 when possible- otherwise
20. 31 16. Alvin Dive 7 no work planned.
21. April 1 17. Alvin Dive 8 (limited number of dredges
22. 2 18. Alvin Dive 9 if no Argo work)
23. 3 19. Alvin Dive 10
24. 4 20. Alvin Dive 11
25. 5 21. Alvin Dive 12
26. 6 22. Alvin Dive 13
27. 7 23. Alvin Dive 14
28. 8 24. Alvin Dive 15; recover last transponders
29. 9 Begin transit
30. 10 transit
31. 11 transit
32. 12 transit; arr. Manzanillo

TOTAL DAYS at SEA: 32 (arrive late 32nd day)
DATES: 3/12/98 to 4/12/98
* night time programs on dive days will be small ARGO surveys as much as possible--should be prepared to dredge as back-up if systems fail or a break is needed.

Date Submitted: 01/19/99 12:47 PM