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ALOHA-MARS Mooring
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2008
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Thomas G. Thompson
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Project Title: |
SENSORS: ALOHA Mooring Sensor Network and Adaptive Sampling |
Project Status: |
Submitted |
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Principal Investigator: |
Bruce M. Howe, UH_SOEST |
Project Institution: |
UW_APL |
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Project ID: |
100200 |
Version #: |
4 |
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Date Submitted: |
2/23/2006 5:57:00 PM |
Created By: |
Bruce M. Howe |
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Date Last Modified: |
6/21/2007 7:54:00 PM |
URI Serial #: |
20020807201630BZ |
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Funding Agencies: |
NSF/OCE/OTIC - 0330082 - Funded |
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Summary of Field Work: |
ALOHA/MARS Mooring Sensor Network/Profiler
We will be deploying (early spring 2008) and recovering (late summer 2008) a mooring network system connected via a seafloor cable to the MARS Observatory node at ~900 m depth in Monterey Bay. The system includes: 1.7 km of seafloor cable connected to the MARS node, a seafloor secondary node, and the mooring. The latter includes an instrument package (dual CTDO2, optical backscatter/fluorometer BB2F, 25 kHz WHOI acoustic micromodem) at the bottom, a MMP profiler (CTDO2, BB2F, acoustic current meter) and inductive docking station, subsurface float at 165 m with secondary node, ADCP, and instrument package (as seafloor + boradband hydrophone). We will need dynamic positioning, given the mooring deployment and recovery method, possible congestion around the site, and the contingency to recovery/redeploy. We will use the SIO TSE multi-bay winch system on the UNOLS ship. We will be using the MBARI ROVs Ventana or Tiberon with their respective support vessels to lay the seafloor cable, install the secondary seafloor node, and connect the base of the mooring. (The cable and node installation will be done well before the mooring deployment to assure proper operation.) The coordination of the two ships/ROV is important during mooring deployment and the connection process. |
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Summary of Facility Requirements: |
The global class Thompson is requested for dynamic positioning, large A-frame, trawl winch, general stability, accurate navigation. These are essential for the deployment and thus the Thompson is being requested.
While we are requesting the Thompson or equivalent also for recovery, the ship requirements for recovery are less stringent. We do not need dynamic positioning. A somewhat smaller A-frame is required (details below). |
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Summary of other requirements and comments: |
On both cruises, we will need to install the SIO TSE winch that will be holding approximately 1000 m of 21mm diameter mooring cable. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1000162 |
Created By: |
Bruce M. Howe |
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Date Last Modified: |
6/21/2007 7:11:00 PM |
Date Submitted: |
2/23/2006 6:01:00 PM |
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Year: |
2008
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Ship/Facility: |
Thomas G. Thompson
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Optimum Start Date:
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4/1/2008 |
Dates to Avoid: |
Dates are contingent on successful operation of the MARS Observatory node and the seafloor cable and secondary node that we will install in a separate operation beforehand, using a MBARI vessel and ROV. (The mooring attaches to the secondary node - it must be working) |
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Earliest Start Date: |
3/1/2008 |
Multi-Ship Op: |
Yes |
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Latest Start Date: |
5/1/2008 |
Other Ship(s): |
We will be chartering one of the MBARI vessels/ROVs to connect the mooring system to the seafloor secondary node. The ROV may observe the lowering of the mooring as well. |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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13 |
3 |
1 |
6 |
23 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
1 |
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Description of Repeating cruise requirements: |
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Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
This is a complicated anchor first mooring deployment. We need to come within 10 m of a seafloor node. This requires dynamic positioning. We need a minimum of 26.5 ft from deck to A-frame attach point, 15 ft width, and 40 ft between the A-frame and winch. The winch needs to be on the main deck to allow load transfers (for which the ship's trawl winch is needed).
On recovery, we need a minimum of 18.5 ft from the deck to the A-frame attach point (no deployment release and pennant necessary in-line for recovery).
Required ship days on station: 1 day prep, 10 days for 3 deploy/test/recover/fix/deploy cycles, 2 weather days for 13 days total on station. Total of 6 days transit Seattle-Monterey-San Diego (weather days included). |
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Short Description of Op Area
for use in schedules: |
Monterey Bay |
| Description of Op Area: |
MARS Observatory, on Smooth Ridge, water depth ~900 m |
| Op Area Size/Dia.: |
2 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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36.7° N
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122.166667° W
map
36° 42' N
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122° 10.00002' W
map
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Ending
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36.7° N
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122.166667° W
map
36° 42' N
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122° 10.00002' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Seattle, WA, USA |
Monterey, CA, USA |
San Diego, CA, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
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Important Info on Working in Foreign Ports
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Chief Scientist: |
Bruce M. Howe, UH_SOEST |
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# in Science Party |
6 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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0 |
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Explanation of Science Party Requirements and Technician Requirements |
To reduce personnel costs, we will likely pickup/drop-off part of the science party in Santa Cruz using the ship's boat. |
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 Dynamic Positioning |  ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
Dynamic positioning essential for placing (and possibly re-placing) the mooring with respect to other bottom instrumentation.
Need precise/accurate GPS to drive the dynamic positioning, i.e., C-Nav decimeter accurate system.
Multibeam is not essential, but would be used to double check the MBARI bathymetry used for planning, prior to mooring installation.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
We are chartering one of the MBARI ROVs with support vessel to make the electrical connection between the base of the mooring and the seafloor seocndary node/junction box (installed beforehand). |
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