Woods Hole Oceanographic Institution
Cruise Planning Synopsis
view revisions | |
AT37-08 Cheadle "Pito Deep Gabbros" | |
Ship | |
R/V Atlantis | |
Vehicles | |
AUV Sentry, ROV Jason | |
Cruise Party | |
Michael Cheadle: Chief Scientist, Principal Investigator University of Wyoming 1000 E University Ave Laramie, Wyoming USA 82071 +1 307 721 5082 cheadle@uwyo.edu Jeffrey Gee: Principal Investigator USA +1 858 534 4707 jsgee@ucsd.edu Barbara John: Principal Investigator University of Wyoming P.O. BOX 3006 Laramie, WY USA 82071 +1 307 766 4232 bjohn@uwyo.edu |
Departure: Jan 14, 2017 | |
Isla de Pascua (Easter Island) | |
Arrival: Feb 20, 2017 | |
Arica- Chile | |
Operations Area | |
Pito Deep, NE corner of the Easter Microplate EPR | |
Lat/Lon: 22° 58.0′ S / 111° 57.0′ W | |
Depth Range: 2000m / 6000m | |
Will the vessel be operating within 200 NM of a foreign country? | no |
Science Objectives | |
i) Map, using Sentry, the bathymetry & collect magnetic data along part of the north wall of Pito Deep in order to a) determine the vertical geometry of the magnetic polarity boundaries (stripes), & b) determine locations for Jason II dives. ii) Conduct Jason traverses (& dredges- during Sentry dives if possible) on the north wall to sample the upper part (1-2km?) of the gabbros that form ocean crust layer 3. The traverses will be spaced over a distance of ~20km allowing us to examine the lateral variation in layer 3 along a flowline & overall determine how ocean crust is accreted. iii) Explore for seafloor fluid flow during Sentry dives; if feasible, prospect for fluid flow with water column sensors. iv) Dive with Jason II to sample any new fluid flow sites found in Pito Deep area Visit the black smoker site on Pito Seamount (2200m), last visited by Nautile 23 years ago to photograph and sample rocks and possibly vent (micro)biological samples. This site is ~50km to the SE of the main work site. (Station 3- Pito Seamount) | |
Science Activities | |
i) Sentry surveys to collect bathymetric, side-scan, and high-resolution magnetic anomaly data, to identify sampling targets and map reversal boundaries. Sentry surveys will be conducted ~80m above bottom, with contour parallel lines and a nominal vertical spacing of 100m to allow complete bathymetric and side-scan coverage with the Reson 7125 system, and to permit gridding of the near-bottom magnetic anomaly data. Approx 8-10 x 20hr dives. Approx 4-5 dives at the start of the cruise. (Area B) & 4-5 dives midway through the cruise (Area A). These Areas are very close to each other (10nm) See supporting figures. | |
Additional Info | |
Pre-cruise Planning Meeting: Teleconference | |
Meeting Notes: 3-way: Cheadle & John in Wyoming Gee at Scripps & WHOI | |
Media personnel on board: Video, Writer, Teacher | |
We have discussed (organized) extra bandwidth with Kevin Walsh (Scripps) HSN support. We have extra monies in the grant for this. We plan on taking 3 media/education folks & plan on carrying out some (2 per day?) 2-way ship to shore broadcasts to schools, societies etc. We intend to make videos, podcasts, blogs etc. | |
Stations: | |
Area B Distance: 279 Days: 10 Latitude: 23° 0.27 S Longitude: 111° 54.219 W Area A Distance: 10 Days: 13 Latitude: 22° 53.021 S Longitude: 112° 3.595 W Pito Seamount Distance: 36 Days: 2 Latitude: 23° 19.742 S Longitude: 111° 38.709 W | |
Supporting documentation: | |
»Atlantis_Ver11Aug16_2017.pdf | |
»Areas-A---B--approx-location-of-Sentry-maps.jpg | |
»Very-approx-location-of-jason-dives.jpg | |
»Tentative-location-map-for-CTD's--&-Pito-Seamounta.jpg | |
Notes: BOXES - FOR CHEADLE from Dan F These notes are from email messages: here is a photo of the science hold with our 3 boxes left for you with the following 1) 1 gray tote with UF microscope and gloves & your 2 microscope lights 2) 1 cardboard box with the shank WHOI microscope 3) 1 large gray case with my 3 monitors (2 work and i have to mail you the dongles) there will be a 4th box - gray plastic tote in that same place too with the expresso maker and 2 coffee pots, grinder etc. there is more coffee beans in with the monitors and #4 and #2 filters and filter holders and 1 grinder 2-Dec-2016 Mike Perfit email A few notes: The UF binoc focus does not rachet to focus any longer but works by moving the oculars up and down with the coarse adjustment.Read the instructions for the espresso maker, it’s a bit different than the one I have at home in terms of “foaming”. It also has sizes for single and double shots. we are leaving a number of pounds of beans and also coffee “pods” that are an easy way to make espresso. 2-Dec-2016 email - Dan F hi sharon OKi’ll put the MAPR case with the other boxes we are leaving for mike and bobbie in the science hold (coffee makers, microscopes, lights, etc) i’ll let allison SSSG know too and will mark the box - it is a black pelican case. |
Funding |
Funding Agency: NSF | |
Grant or contract number: 1459387 | |
Funding Agency: NSF | |
Grant or contract number: 1459462 |
Scientific Instrumentation for R/V Atlantis |
Shipboard Equipment | |||||||||||
Bathymetry System 3.5 kHz | |||||||||||
Relay Transponder for Wire Use | |||||||||||
12 kHz Pinger for Wire Use | |||||||||||
Transponder Navigation - Sonardyne USBL | |||||||||||
Navigation - Heading | |||||||||||
Multibeam | |||||||||||
Navigation - Position | |||||||||||
Towed Magnetometer | |||||||||||
Shipboard Communication | |||||||||||
Basic Internet access via HiSeasNet | |||||||||||
Is there an expectation to use Skype or any other real-time video conference program? | |||||||||||
Is there a need to transfer data to shore on a regular basis? | |||||||||||
CTD/Water Sampling | |||||||||||
911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors | |||||||||||
Seapoint STM turbidity sensor | |||||||||||
Wet Labs C*Star transmissometer (660nm wavelength) | |||||||||||
Critical CTD Sensors | |||||||||||
If the STM is not already High-Gain (same as on Sentry) then Chris German can bring his own (2) | |||||||||||
Sediment Sampling | |||||||||||
Rock dredges | |||||||||||
Sample Storage | |||||||||||
Freezer -70°C 25 cu. ft. | |||||||||||
Freezer -70°C 3.2 cu. ft. ea. | |||||||||||
Storage Notes: We would like the opportunity to collect voucher biological samples from Pito Seamount since that site has never been sampled previously. Best practice for DNA analyses of samples (to be offloaded at cruise end and airshipped back to US) would be to freeze samples to -70C while at sea. | |||||||||||
Navigation | |||||||||||
Will you be using Long Base Line (LBL) navigation? | no | ||||||||||
How many nets? | null | ||||||||||
How many tansponders? | null | ||||||||||
Will you be using Ultra-short baseline (USBL) navigation? | no | ||||||||||
Navigation | |||||||||||
GPS | |||||||||||
USBL | |||||||||||
Navigation Notes:
We will require USBL for Sentry and Jason navigation. Ideally, we would also like to attach a USBL beacon to the CTD so that if we find signals indicative of seafloor fluid flow, we know where those samples come from, at depth. | |||||||||||
Winches | |||||||||||
CTD Winch with .322" Electro-mechanical wire | |||||||||||
Trawl Winch with 9/16th trawl wire | |||||||||||
Winch Notes:
a) CTD winch for CTD-rosette operations (vertical casts + Niskin sampling for methane analyses on ship using Jeff Seewald - WHOI MC&G's Gas Chrmatograph, operated by Sean Sylva (WHOI) b) Trawl winch (presumably) for seafloor dredging - can WHOI provide Dredge Baskets etc? | |||||||||||
Wire use and application | |||||||||||
Trawl Winch with 9/16th trawl wire | |||||||||||
Winch Notes: | |||||||||||
Standard Oceanographic Cables | |||||||||||
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Specialized Deck Equipment | |||||||||||
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Over the Side Equipment | |||||||||||
Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? | no | ||||||||||
Special Requirements | |||||||||||
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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? | yes | ||||||||||
Describe deployment method and quantity: Sean Sylva (WHOI MC&G) will be operating a gas chromatograph aboard ship which requires use of compressed gases. We will complete all necessary paperwork well ahead of the cruise, as required. | |||||||||||
Radioactive Material | |||||||||||
Radioiosotopes: | no | ||||||||||
Additional Information | |||||||||||
Is night time work anticipated on this cruise? | yes | ||||||||||
Specialized tech support (Seabeam, coring, other): Dredging, Jason, Sentry CTD casts will be conducted between Jason dives, whenever those opportunities arise. These casts (up to 5h duration at 5000m depth) may be at night rather than in day time. | |||||||||||
Other required equipment and special needs: We plan to launch a 5ft long mini-boat/float for middle school kidz at some pt. during the cruise Also, we will be carrying six Argo floats for James Gilson to launch periodically during the transit to Chile We will also need the rock saws. The one that is available on Atlantis & if necc. the 2nd one that will be travelling with the Gregg cruise. To save costs, we plan on sharing some equipment (microscopes etc.). |
Scientific Instrumentation for HOV Jason |
Site Survey | |
Will you provide detailed charts of the work area(s)? | yes |
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? | no |
How many nets? | null |
How many tansponders? | null |
Will you be using Ultra-short baseline (USBL) navigation? | no |
Will you be using Doppler/GPS navigation? | no |
What type of samples do you expect to collect? | Primary objectives: rock sampling (including oriented samples using orientation device described below) Fluid flow sites: sampling of vent-fluids with IGT samplers (Seewald laboratory, WHOI) and biological samples using slurp sampler, bio-boxes |
Elevators | |
Will you be using elevators to transport samples to the surface? | yes |
If yes, how many would you anticipate? | Multiple deployments as necessary to recover rock samples. We plan 5 Jason dives up to 5km long. |
Science Supplied Equipment | |
Are you supplying equipment to be used on HOV Jason | yes |
Has this equipment been used on Jason before? | yes |
Please give a brief description of the equipment, its intended purpose, the cruise # it was last used on if any and its deployment method.
Collecting oriented rock samples is a primary goal of the cruise. We will supply a miniature orientation device and pressure case (with a backup sensor and pressure case) with T-bar for manipulation. We have been in touch with Tito Collasius about the orientation device (power, coms needs). The sensors (Applied Physics Systems 544 orientation sensors) have been used previously on Jason (cruise AT11-23) mounted on the side of the ROV. In this application, a single sensor will be used with the manipulator arm to record orientation of rock surfaces. Previous pressure tests can be supplied and the pressure cases will be retested if any modifications are made. We will bring sets of Jeff Seewald's IGT vent-fluid samplers for Pito Seamount and/or any other fluid flow sites that we find. These samplers have been used repeatedly on numerous past Jason and Alvin cruises aboard the Atlantis. | |
Does this equipment use an external pressure housing? | yes |
If yes, what is the pressure rating? | |
and test pressure? | |
Has the pressure housing been tested per Alvin Pressure Test requirements? | yes |
Pressure 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? | 10 |
Water weight of this equipment? | 4 |
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? | yes |
If yes, please describe how the equipment is to be manipulated:
The orientation devices are housed in cylindrical Ti pressure cases approximately 8" long and 2" in diameter. We intend to construct a T-bar (at least 7" tall and 3.5" wide per communication with WHOI) attachment for manipulation. The base of the cylindrical pressure case will have metal base plate (approximately 6-8" diameter) attached that will be placed against the rock. It would be ideal if real time azimuth and plunge information from the sensor could be displayed/recorded during sampling. | |
Will this equipment be deployed off the vehicle? | no |
If yes, please describe how the equipment is intended for deployment: | |
If yes, will the equipment be disconnected from the vehicle and left in situ? | no |
How long will the deployment be? | |
Will the equipment be recovered by the same vehicle? | no |
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: | |
Additional Information | |
Brief operations description or comments: Require depth & any orientation information to be shown on Jason video. |
Scientific Instrumentation for AUV Sentry |
Site Survey | |
Will you provide detailed charts of the work area(s)? | no |
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? | no |
How many nets? | null |
How many tansponders? | null |
Will you be using Ultra-short baseline (USBL) navigation? | no |
Will you be using Doppler/GPS navigation? | no |
Science Supplied Equipment | |
Are you supplying equipment to be used on HOV AbeSentry | yes |
Has this equipment been used on AbeSentry 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.
J. Gee will supply a Cs magnetometer system and pressure case. This prototype sensor from Geometrics has two small (~1 cubic inch) sensors and will allow total magnetic field intensities to be measured without the need for calibration and may also yield short baseline gradiometry data. We have been in discussion with Carl Kaiser about the sensor mounting, data logging and requirements for the pressure case. The sensor will be delivered in mid Sept. and a pressure case is in design. Because of the length of the pressure case (~36”) we anticipate that pressure tests will be conducted at WHOI. The sensor package is currently under review for export control. We have initiated a license request in the event that the sensor will be subject to ITAR/EAR export control. | |
Does this equipment use an external pressure housing? | yes |
Has the pressure case been tested to the anticipated depth of deployment?& | no |
Pressure housing schematic with dimensions and include air and water weights. | |
Air weight of this equipment? | 30 |
Water weight of this equipment? | 10 |
Does the equipment require data or a power interface from the vehicle? | yes |
Does the equipment meet the electrical requirements of the Sentry User Manual? | yes |
Additional Information | |
Brief operations description or comments: Primary objectives for Sentry will be seafloor geophysical surveys- bathymetry, sidescan & magnetics. Secondary objectives will include seafloor fluid flow detection and bottom photography in any candidate fluid flow sites. |
Checklist & Notes |
Checklist | |
U.S. Customs Form: | no |
Diplomatic Clearance: | no |
Date Submitted: | |
Date Approved: | |
Agent Information: | |
Countries: | |
Notes: | |
Isotope Use Approval: | no |
Isotope Notes: | |
SCUBA Diving: | no |
Checklist | |
SSSG Tech: | |