Woods Hole Oceanographic Institution

Cruise Planning Synopsis

view revisions

AT42-21: Sylvan "9N"


R/V Atlantis


HOV Alvin

Cruise Party

Daniel Fornari: Principal Investigator
Woods Hole Oceanographic Institution Clark South 172B, MS#24 Woods Hole, Ma. USA 02543
+1 508 289 2857

Lauren Mullineaux: Principal Investigator
+1 508 289 2898

Jason Sylvan: Chief Scientist, Principal Investigator
Texas A&M University Dep't of Oceanography, Eller O&M Bldg, Rm 1204 College Station, TX USA 77843-3146
+1 979 845 5105

Departure: Dec 17, 2019

Manzanillo, Mexico

Arrival: Jan 7, 2020

Balboa, Panama

Operations Area

East Pacific Rise
Lat/Lon: 9° 50.0′ N / 104° 17.0′ W
Depth Range: 2000 / 2600
Will the vessel be operating within 200 NM of a foreign country? don't think so
Are visas or special travel documents required? no

Science Objectives

there are three groups coming out on this cruise.  for the Sylvan group, the objectives are to study the transition in mineralogy and microbiology as active hydrothermal sulfides transition to inactive.  we will do this through a combination of collecting exposure experiments set out in March 2019, currently sitting judst outside the axial valley on bare basement ~75 m from Bio9 or down near Q vent as well as collecting already inactive sulfides for comparison to the exposure experiments.  we will also collect seafloor basalts for microbiology analysis.  for the Mullineaux group, she will be collecting larval experiments previously deployed as part of an ongoing experiment by her lab and potentially collecting other animals as well.  for the Fornari group, they will be using Sentry at night to map the region down to 9.45N.

Science Activities

12 Alvin dives are planned.  we will be collecting inactive vent sulfides, seafloor exposure chambers for both Mullineaux and Sylvan - different experiments but for both picking up previously deployed experiments), collevcting seafloor basalts (on a few dives, this is a secondary objective), potentially collecting Major samples of hot fluids and possibly diffuse fluids when swapping out temperature loggers (Fornari), and using Sentry in the evenings.

Additional Info

Pre-cruise Planning Meeting: Teleconference
Meeting Notes: visit if necessary but schedule may not permit. Meg Tivey is co-PI on my grant and can help locally as needed. Fornari can't help himself and will help, and Mullineaux is also local and can help as needed
Media personnel on board: Video, Writer
i hope to bring an outreach specialist, Rebecca Fowler (http://www.rebeccafowler.org/) but funds need to be secured to confirm


  EPR 9 50'N
  Distance: 551
  Days: 12
  Latitude: 9° 50.0’ N
  Longitude: 104° 17.0’ W

Supporting documentation:


Funding Agency: NSF
Grant or contract number: 1756339 (Sylvan)
Funding Agency: NSF
Grant or contract number: unknown, OCE-MGG (Fornari)
Funding Agency: NSF
Grant or contract number: 1829773 (Mullineaux)

Scientific Instrumentation for R/V Atlantis

Shipboard Equipment

12 kHz Pinger for Wire Use
Bathymetry System 3.5 kHz
Deionized Water System
Fume Hood
Navigation - Heading
Navigation - Position

Shipboard Communication

Basic Internet access via HiSeasNet
Is there an expectation to use Skype or any other real-time video conference program?

CTD/Water Sampling

911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors
Biospherical underwater PAR (1000m depth limit) with reference Surface PAR
SBE43 oxygen sensor
Seapoint STM turbidity sensor
Wet Labs C*Star transmissometer (660nm wavelength)
Wet Labs ECO-AFL fluorometer

Critical CTD Sensors

CTD use not likely on this cruise, but checking off here so that it is available if needed

CTD-Related Equipment

Lowered Acoustic Doppler Current Profiler (LADCP)

Sample Storage

Climate Controlled Walk-in
Freezer -70°C 25 cu. ft.
Refrigerator 8.6 cu. ft.
Scientific Walk-in Freezer
Scientific Walk-in Refrigerator
Freezer -70°C 3.2 cu. ft. ea.
Storage Notes: will need refrigerated walk-in, -70C freezer (as much space as possible), -20C freezer, and a standing refrigerator in the main lab.  potentially the walk-in can serve as a refrigerator, but would be best to have walk-in refigerator AND a standard, kitchen-sized unit in the lab


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 Notes: not sure what to write here, we need whatever is necessary for getting to the sites and using Alvin
Winch Notes: we will be using Sentry and deploying elevators, so the winches necessary for those deployments will be needed
Winch Notes: an ADCP from Andfreas Thurnherr will be deployed at the beginning of the dive series and i believe recovered at the end, not sure what wire use needs are for that but we will need to determine.  this has been done previously with this system, so all needed info should be available

Standard Oceanographic Cables

Slip ring required? no
Non-standard wire required? no
Traction winch required? no

Portable Vans

Isotope Van

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: yes Type: ADCP
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?yes
Describe deployment method and quantity:
in progress, but primarily formaldehyde for fixing samples, ethanol for cleaning equipment and acids for chemistry and/or cleaning equipment.  MSDS's will be supplied.

Radioactive Material


Additional Information

Is night time work anticipated on this cruise?yes
Specialized tech support (Seabeam, coring, other):
night time Sentry mapping ops will be conducted
Other required equipment and special needs:
we will be ordering 3-4 canisters of N2 gas for onboard use

Scientific Instrumentation for HOV Alvin

Current Chart(s):

What type of samples do you expect to collect?sulfide rocks, basalt rocks, hydrothermal fluids collected via major samples, potentially microbial mats via slurp sampler, likely animals as part of Mullineaux group sampling. also, at least three types of exposure experiments (Sylvan's, Mullineaux's and a design from Heather Fullerton that was used on ECS 2018 cruise and Hot2Cold Vents in March 2019. null

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


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 for other than Alvin operations?no

Vehicle Equipment

Scoop nets
Niskin bottles (1L bottle rack)
Small capacity slurp samplers
Large capacity slurp samplers: single-chamber
Large capacity slurp samplers: multi-chamber
Bio collection boxes: 12 x 12 x 12
Bio collection boxes: 12 x 12 x 24
Major (dual) pair water sampler(s) with ICL temperature probles
Niskin bottles (2L bottle)
Special micro-bio box 12" x 18" x 12"
Slurp pump: single chamber high flow
Slurp pump: 5-chamber high flow
Slurp pump: 5-chamber very large high flow
Slurp pump: single chamber 'pelagic' medium flow
Rock collection baskets: 12" x 18" x 12" milk crates
Rock collection baskets: 12" x 12" x 12" milk crates


Will you be using elevators to transport samples to the surface?yes
If yes, how many would you anticipate? elevator will be used to deploy a plankton pump to collect large volume fluid samples on ~6 dives

Science Supplied Equipment

Are you supplying equipment to be used on HOV Alvin no
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.
Does this equipment use an external pressure housing? no
Has the pressure housing been tested per Alvin Pressure Test requirements? no
Pressure housing schematic with dimensions and include air and water weights.
Air weight of this equipment?
Water weight of this equipment?
Does the equipment require a power interface from Alvin? no
Voltage required
Power required
Data Interface
Does the equipment meet the electrical requirements of the Alvin User Manual? no
Please provide power and comms specifics, wiring diagram, pinout, and wiring harness in advance of the cruise.
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:
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
Do you intend to recover any other previously deployed equipment? yes
If yes, please describe this equipment:
high temperature logger, microbial growth chambers (Fullerton), Sylvan's exposure chambers, Mullineaux's larval settling experiments.
Does this equipment use any glass spheres for either buoyancy or as pressure housings? no
Does the equipment have an associated computer or control panel for remote operation from the personnel sphere? no
Has the computer or control panel been gas tested for use in the personnel sphere? no

Hazardous Material

Will hazardous material be utilized?no
Describe deployment method and quantity:

Additional Information

Brief operations description or comments:
Navy Clearance:
Granted 12/3/2019:
WITHIN 50 NM RADIUS OF 09-50N 104-18W DURING PERIOD 180800Z DEC 19 THRU 050800Z JAN 20

Checklist & Notes


U.S. Customs Form: no
Diplomatic Clearance: no
Date Submitted:
Date Approved:
Agent Information:
Isotope Use Approval: no
Isotope Notes:
SCUBA Diving: no


SSSG Tech: