Thermal Grid / Optical comms 2011

Ship

R/V Atlantis

Vehicles

ROV Jason

Cruise Party

Norman Farr: Principal Investigator
Organization Name 360 Woods Hole Rd. Woods Hole, MA USA 02543
+1 508 289 3499
nfarr@whoi.edu

Harlan Johnson: Chief Scientist
University of Washington Seattle, WA USA 98195
+1 206 543 8474
johnson@ocean.washington.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, OR on Aug 6, 2011

Arrival: Astoria, OR on Aug 26, 2011

Mobilization Date: Aug 4, 2011

Demobilization Date: Aug 28, 2011

Supporting documentation:

Operations Area: Endeavour Ridge and Middle Valley, Northern Juan de Fuca Ridge

Lat/Lon: 48° 0.0′ N / 129° 0.0′ W

Depth Range: min / 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

JOHNSON/TIVEY THERMAL GRID EXPT

High resolution geophysical survey of a hydrothermally-active section of the Endeavour Segment RIDGE2000 study area.  We wish to test the hypothesis that crustal fluid undergoes substantial horizontal sub-surface transit across the axial valley floor prior to emission, to better constrain the sub-surface structure of a high temperature vent system, and to identify re-charge zones where seawater is entering into the crustal hydrothermal reservoir. 

TIVEY/FARR/WARE

Testing of underwater optical communications of both previously installed equipment on the seafloor as well as with an experimental lander and ROV-mounted receivers and transmitters.

Science Activities

JOHNSON/TIVEY THERMAL GRID

(a) extensive deployment of thermal blankets to measure conductive heat flux at 140 sites within the axial valley near the RAVEN hydrothermal vent area. Each blanket requires 6 hr equilibration time. We expect to have 14 blankets to move around checkerboard style.

(b) conduct near-bottom magnetic field and high-resolution swath bathymetry surveys with the ROV Jason II around the RAVEN vent field.

(c) additional heat flux measurements outside of the rift valley.

TIVEY/FARR/WARE OPTICAL COMMS

(a) visit Middle Valley borehole observatory site CORK 857D and test already deployed optical communication installation. In situ testing will consist of CTD moutned optical comms and then ROV optical comms.  After in situ testing, we will recover this equipment for refurbishment/rebattery. We will redeploy the optical comms unit back at the same location later on in the cruise.

(b) test high-speed optical comms within the Endeavour rift valley. Several types of tests are envisioned with a lander and optical receivers and transmitters mounted onto ROV Jason.

(c) test high speed optical comms at off axis site (expect different water quality).

 

Pre-cruise planning meeting: Teleconference/Visit WHOI

Paul Johnson - teleconference Maurice Tivey - already at WHOI Norm Farr - already at WHOI

Stations:

Funding Agency: NSF-OTIC #0926849, 0942835, NSF #NSF OCE 1037870

- added NSF-OTIC #0926849, 0942835 on Jun 17, 2011 1:04 PM by
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R/V Atlantis

Shipboard Equipment

Transponder Navigation - Sonardyne USBL
Navigation - Heading
Multibeam
Navigation - Position
Gravimeter

Shipboard Communication

Basic Internet access via HiSeasNet

CTD/Water Sampling

911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors

Critical CTD Sensors:  We will modify the CTD rosette by mounting optical comms gear and use the SDSL comms link

Storage Notes:

Navigation

Will you be using Long Base Line (LBL) navigation? no

Will you be using Ultra-short baseline (USBL) navigation for other than Alvin operations? no

Navigation

GPS
LBL
USBL

Navigation Notes: navigation for ROV Jason at Raven site will likely require LBL.
navigation at CORK 857D will need USBL only.
navigation for off-axis heat-flow site will need USBL only.

Winches

CTD Winch with .322" Electro-mechanical wire

Winch Notes: CTD with optical comms equipment mounted to rosette frame.
SDSL comms over CTD wire

Wire use and application

CTD Winch with .322" Electro-mechanical wire


Wire Notes: CTD with optical comms equipment mounted to rosette frame.
SDSL comms over CTD wire

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? yes

Details: We will bring a WOCE drifter to deploy for a few days and then pick up later in the cruise.

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? no

Specialized tech support (Seabeam, coring, other):  Only possible night work other than ROV Jason might be CTD ops for optical comms testing.

Other required equipment and special needs: 

ROV Jason

Site Survey

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


If no, willl you need Jason to generate maps of the work area(s)?  yes

Will you need post-dive maps of the work area generated?  yes

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? yes

Will you be using Doppler/GPS navigation? yes

Sensors & Samplers

Magnetometer
What type of samples do you expect to collect?
Do not plan on taking any samples.

Elevators

Will you be using elevators to transport samples to the surface?  yes

If yes, how many would you anticipate?  4

Science Supplied Equipment

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

Has this equipment been used on Jason 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.
Univ. Washington thermal blankets : 14 units, each approx 1 m x 1m in size.  These will need to be deployed by ROV Jason. They are self recording instruments.  We will need elevators to bring them down to the seafloor and return to surface for data download.

Optical comms equipment (NORM NEEDS INPUT HERE)
** from Pre cruise meeting **
Norm Farr and John Ware will be mounting 3 optical emitters on Jason, 1 optical reciever on Jason, 1 extra optical reciever for the basket,  and 1 optical receiver on Media.

~250 lbs in air.

Optics testing without ANY light from Jason.  Science understands that there would be small amounts of light from certain internal electronics on Jason.  
Optics test will need to survey flat bottom ~ 100 nm radius

Need ethernet / power tap (2)



Does this equipment use an external pressure housing?  yes

If yes, what is the pressure rating? 
and test pressure? 

Or has the pressure case been tested per Alvin Pressure Test requirements?  no

Housing schematic with dimensions and include air and water weights.

Does the equipment have an associated computer or control panel for remote operation from the personnel sphere?  no

Air weight of this equipment? 

Water weight of this equipment? 

Does the equipment require data or a power interface from the vehicle?  yes

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

Does this equipment require manipulation?  no

If yes, please describe how the equipment is to be manipulated.

Will this equipment be deployed off the vehicle?  no

If yes, please describe how the equipment is intended for deployment.
Univ. Washington thermal blankets.  Passive deployment onto the seafloor. Each blanket requires 6 hours for equilibration with environment (ie to establish a thermal gradient within the blanket).  These are self recording units.  We will have 14 blankets and will be using a "checkers game" approach to moving these over a predetermined grid of proposed sites.  Blankets will need to be recovered periodically to download data.

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

How long will the deployment be?  8  Days

Will the equipment be recovered by the same vehicle?  yes

If recovering equipment deployed with another vehicle, provide pressure rating: 
and test pressure: 

Does this equipment use any glass spheres for either buoyancy or as pressure housings?  no

Hazardous Material

Will hazardous material be utilized? no

Describe deployment method and quantity:
Lithium batteries

Additional Information

Brief operations description or comments:

Date Submitted: Jul 18, 2011 2:13 PM