Ship Request

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  S. Atlantic Seismic  -  2016  -  Marcus Langseth  
  Project Information  
Project Title: Evolution of South Atlantic Oceanic Crust: A Seismic Transect Project Status: Submitted
Principal Investigator: Robert Reece, TAMU_CS Project Institution: TAMU_CS
Project ID: 104453 Version #: 6
Date Submitted: 8/5/2014 6:13:00 PM Created By: Robert Reece
Date Last Modified: 7/15/2015 3:49:00 PM URI Serial #: None
Funding Agencies: NSF/OCE/MGG - 1537108 - Funded
Summary of Field Work: A geophysical survey to characterize the fundamental structure and evolution of slow-spread oceanic crust with age, and the age range for oceanic crust layers to reach mature velocities. This survey will be the most comprehensive study of oceanic crust at any spreading rate (across a 70 myr age range) and will serve as a foundation for comparison to similar studies of intermediate and fast spreading crust. Additionally, this will serve as a site survey for a proposed IODP drilling transect (853-Pre), which has already been favorably reviewed by the IODP Science Evaluation Panel.

Work will consist of a 31 day geophysical survey split between multi-channel seismic (MCS) and ocean-bottom seismometer (OBS) deployments in the Southern Atlantic Ocean. The survey sites extend from just east of the Rio Grande Rise eastward to the Mid-Atlantic Ridge. We estimate 13.5 days of shooting on a 1550 km MCS profile with an 8 km streamer and 36-airgun array. In addition, there will be 5 OBS sites, each with 7 OBS. We estimate 12 days total to deploy, shoot, and recover OBS, plus 3.5 days to transit back along the profile. Transit to and from port is additional. 2 contingency days are planned.
Summary of Facility Requirements: 8 km hydrophone streamer; airgun array; A-frame/crane with winch for OBS deployment/recovery; dry lab space for OBS assembly; dry lab space for OBS storage; deck space for OBS anchor storage.
Summary of other requirements and comments:  
Ship Request Identification
Type of Request: Primary Ship Use Request Status: Submitted
Request ID: 1007143 Created By: Robert Reece
Date Last Modified: 2/7/2015 5:02:00 PM Date Submitted: 8/5/2014 6:13:00 PM
Requested Ship, Operating Days and Dates
Year: 2016 Ship/Facility: Marcus Langseth
Optimum Start Date: 5/1/2016 Dates to Avoid: Requested ship dates provided just as a starting point; not firm for any reason.
Earliest Start Date: 1/1/2016 Multi-Ship Op: No
Latest Start Date: 11/1/2016 Other Ship(s):

Operating Days Needed: Science Days Mob Days De-Mob Days Estimated Transit Days Total Days
31 1 1 9 42
Repeating Cruise?
(within same year)
No Interval:   # of Cruises:  

Description of Repeating cruise requirements:
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations:
Work Area for Cruise
Short Description of Op Area
for use in schedules:
South Atlantic
Description of Op Area: One main transect in the S. Atlantic from Rio Grande Rise off the coast of Brazil to the mid-Atlantic Ridge.
Op Area Size/Dia.: ~810nm E-W; 27nm to N & S at 5 sites on profile
  Lat/Long Marsden Grid Navy Op Area
30.95424° S / 27.54342° W map
410 map
SA03 map
30.21482° S / 15.09177° W map
409 map
SA03 map
  Show Degrees Minutes    
Foreign Clearance and Permitting Requirements
Foreign Clearance Required? No Coastal States:
 Important Info on Foreign Research Clearances  

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)?
No If yes, have you applied for the necessary permits through your export control office? No
 Questions about ITAR/EAR regulations?

Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.)
Port Calls
Requested Start Port Intermediate Port(s) Requested End Port
Santos, Brazil None Santos, Brazil
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops

 Important Info on Working in Foreign Ports

Science Party
Chief Scientist: Robert Reece, TAMU_CS
# in Science Party 19 # of different science teams 1 # Marine Technicians to be
provided by ship operator:
(include in science party total)
Explanation of Science Party Requirements and Technician Requirements We anticipate 9 science party members from TAMU and UTexas, and this is the number listed above. We will also have a team from OBSIP for OBS ops- number unknown. Ship operator science party members should include those required for 2D MCS operations- number unknown.
Instrumentation Requirements That Impact Scheduling Decisions
Unselected Dynamic PositioningUnselected ADCPUnselected MultibeamSelected Seismic
Unselected Dredging/Coring/Large Dia. Trawl WireUnselected Stern A-frameUnselected Fiber Optic (.681)Unselected 0.680 Coax Wire
Unselected SCUBA DivingUnselected Radioisotope use - briefly describeUnselected NO Radioisotope use/Natural level workUnselected Other Operator Provided Inst. - Describe
0 PI-Provided Vans - briefly describe Unselected MOCNESS  
Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling.

We will request 2D MCS operations with an 8 km streamer.

Major Ancillary Facilities (that require coordination of schedules with ship schedule)
Unselected Helicopter Ops (USCG)Unselected Twin OtterUnselected Unmanned Aerial Systems (UAS) 
Autonomous Underwater Vehicle (AUV)
Unselected Other AUVUnselected Sentry  
Coring Facility
Unselected Jumbo Piston CoringUnselected Large Gravity Core Unselected MC800 multicorer w/ MISO camera/telemetryUnselected OSU Coring Facility (MARSSAM)
Unselected Other Large Coring FacilityUnselected WHOI Long Core  
Human Occupied Vehicle (HOV)
Unselected AlvinUnselected Clelia (HBOI)Unselected JSL I & II (HBOI)Unselected Other HOV
Other Facility
Unselected MISO Facility - deep-sea imagingUnselected Other FacilityUnselected Potential Fields Pool Equipment 
Remotely Operated Vehicle (ROV)
Unselected JasonUnselected Other ROV  
Seismic Facility
Unselected Ocean Bottom Seismograph Instrument Center (OBSIC)Selected Ocean Bottom Seismograph Instrument Pool (OBSIP)Unselected Ocean-Bottom Seismometer Program (UTIG)Unselected Other Seismic/OBS Facility
Unselected PASSCALUnselected Portable MCS groupUnselected Portable MCS/SCS groupUnselected U.S. Geological Survey Ocean Bottom Seismometer Facility (USGS at WHOI)
Towed Underwater Vehicle
Unselected ARGO IIUnselected Hawaii MR1 (HMRG)Unselected IMI12 (HMRG)Unselected IMI120 (HMRG - formerly DSL 120A)
Unselected IMI30 (HMRG)Unselected Other Towed Underwater VehicleUnselected Towfish 
UNOLS Van Pool
Unselected AUV Lab Van #1Unselected Clean Lab VanUnselected Cold Lab VanUnselected General Purpose Lab Van
Unselected Radioisotope Lab VanUnselected Wet Lab Van  
UNOLS Winch Pool
Unselected Mooring SpoolerUnselected Portable WinchUnselected Turn Table 
Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems.
We have a request in with OBSIP for 5 deployments each of 7 short period OBS.

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