Optical Comms 2010

Ship

R/V Atlantis

Vehicles

HOV Alvin

Cruise Party

Raymond Lee: Chief Scientist
Washington State University Pullman, WA USA 99164
+1 509 335 5727
rwlee@wsu.edu

Maurice Tivey: Principal Investigator
Woods Hole Oceanographic Institution Clark 256, MS#22 Woods Hole, Ma. USA 02543
+1 508 289 4845
mtivey@whoi.edu

Departure: Astoria, Oregon on Jul 6, 2010

Arrival: Astoria, Oregon on Jul 26, 2010

Supporting documentation:

»cork2010_detail.jpg

Operations Area: Northeast Pacific

Lat/Lon: 47° 54.0′ N / 128° 36.0′ W

Depth Range: 2650 / max (m)

Will the vessel be operating within 200 NM of a foreign country? Canada
Are visas or special travel documents required? no

Science objectives

1) To install a seafloor optical communication device at a CORK instrumented borehole well-head (nominally Hole 1025C 47.887450 deg. N, 128.648650 deg. W).
2) To carry out a series of communication tests between the seafloor device and the submersible Alvin. 
3) Test a ship-based CTD-wire version of the optical communication device lowered to the seafloor in the vicinity of the CORK to test a remote mode of communications.
4) Test optical ranges within the Endeaour rift valley using Alvin

Science Activities

3 Dives
Dive-1 install and test CORK 1025C optical communication device
Dive-2 finish range testing at CORK 1025C
Dive-3 Endeavour Ridge dive with portable Optical comms unit

2 days of night time operations for CTD wire lowered optical comms unit at CORK 1025C

Pre-cruise planning meeting: Visit WHOI

Already here at WHOI

Stations:

  Station 1
  Distance: 300
  Days: null
  Latitude: 47° 53.0’ N
  Longitude: 128° 39.0’ W

Funding Agency: NSF #OCE-0926849

- added NSF #OCE-0926849 on Apr 22, 2010 4:46 PM by Maurice Tivey

R/V Atlantis

Shipboard Equipment

Relay Transponder for Wire Use
Navigation - Position

Critical CTD Sensors:  CTD wire and frame for mounting optical comms unit

Navigation

Will you be using Long Base Line (LBL) navigation? yes

How many nets? 1

How many tansponders? 2

Will you be using Ultra-short baseline (USBL) navigation for other than Alvin operations? yes

Winches

CTD Winch with .322" Electro-mechanical wire




Wire Notes: Not sure of this at the present time.

Slip ring required? no	Number of conductors:
Non-standard wire required? no	Type:
Traction winch required? no	Describe:

Other Science Vans:

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: no	Type:
Cruise Specific Science Winch Required: no	Type:
Nets Required: no	Type:

Over the Side Equipment

Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? no

Special Requirements

Elecrical Power: no	Identify:
Equipment Handling: no	Identify:
Inter/intraship Communications: no	Identify:
Science Stowage: no	Identify:
Water: no	Identify:

Additional Cruise Items/Activities

Explosive Devices: no Portable Air Compressors: no Flammable Gases: no

Small Boat Operations: no SCUBA Diving Operations: no

Hazardous Material

Will hazardous material be utilized? no

Radioactive Material

Radioiosotopes: no

Additional Information

Is night time work anticipated on this cruise? yes

Specialized tech support (Seabeam, coring, other):  CTD operations for lowering optical comms unit on CTD winch/frame. need realtime communications and USBL for positioning

Other required equipment and special needs: 

HOV Alvin

Site Survey

Will you provide detailed charts of the work area(s)?  no
Current Chart(s):


If no, willl you need R/V Atlantis to generate maps of the work area(s)?  no

Will you need post-dive maps of the work area generated?  no

Navigation

Will you be using Long Base Line (LBL) navigation? yes

How many nets? 1

How many tansponders? 2

Will you be using Ultra-short baseline (USBL) navigation for other than Alvin operations? yes

What type of samples do you expect to collect?

Elevators

Will you be using elevators to transport samples to the surface?  yes
If yes, how many would you anticipate?  0

Science Supplied Equipment

Are you supplying equipment to be used on HOV Alvin?  yes

Has this equipment been used on Alvin before?  no

Please give a brief description of the equipment, its intended purpose, the cruise # it was last used on if any and its deployment method.
We will being deploying a seafloor optical communications unit at the CORK wellhead 1025C using ALVIN. We will also use a matching comms unit mounted on the HOV to receive realtime data inside the sphere.

The equipment is being built at present and so weights are TBD.

Does this equipment use an external pressure housing?  yes

Has the pressure housing been tested per Alvin Pressure Test requirements?  no

Air weight of this equipment?

Water weight(s) of this equipment?

Does the equipment require a power interface from Alvin?  yes

Voltage required

Power required

Data Interface

Does the equipment meet the electrical requirements of the Alvin User Manual?  yes

Please provide power and comms specifics, wiring diagram, pinout, and wiring harness in advance of the cruise.

Does this equipment require hydraulic inputs from Alvin?  no
Hydraulic schematic of the equipment requirements.

Does this equipment require manipulation?  yes

If yes, please describe how the equipment is to be manipulated:  The seafloor optical comms unit will need to be installed with an Underwater mateable connector to the exisiting data logger unit at the CORK.


Will this equipment be deployed off the vehicle?  yes

If yes, please describe how the equipment is intended for deployment:  The seafloor optical comms unit is a stand alone unit with its own battery pack.
It will communicate using light (LED-based) with an optical receiver installed on the HOV.
The optical rcvr will be wired into the sub to receive data inside the sphere for testing.

If yes, will the equipment be disconnected from the vehicle and left in situ?  yes

How long will the deployment be?  12  Months

Will the equipment be recovered by the same vehicle?  yes

Do you intend to recover any other previously deployed equipment?  no

If yes, please describe this equipment:  We will deploy the seafloor optical comms unit at the CORK 1025C well head. Wi will hook up this unit to the exisiting data logger and then leave the unit in place for nominally one year.
The plan would be to revisit with Jason in 2011 to retrieve data and retrieve the unit, to rebattery and to reinstall for another year.

Does this equipment use any glass spheres, ceramic housings or similar (non-metallic materials) for either buoyancy or as pressure housings?  no

Do you require any electronic equipment in the personal sphere? yes

Has the computer or control panel been gas tested for use in the personnel sphere?  no

Hazardous Material

Will hazardous material be utilized? no

Additional Information

Brief operations description or comments:

Date Submitted: May 13, 2010 9:34 AM by Elizabeth A. Caporelli