Ship Request

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  NE Shelf Freshwater  -  2009  -  Oceanus  
  Project Information  
Project Title: Collaborative Research: Stratigraphic Controls on Freshwater Beneath the Continental Shelf Project Status: Submitted
Principal Investigator: Brandon Dugan, Rice Project Institution: Rice
Project ID: 101442 Version #: 2
Date Submitted: 2/8/2008 1:05:00 PM Created By: Brandon Dugan
Date Last Modified: 2/8/2008 1:13:00 PM URI Serial #: None
Funding Agencies: NSF/OCE/ODP - 0824368 - Funded
Summary of Field Work: We propose to collect high-resolution multi-channel (MCS) and chirp seismic data across the New England continental shelf, south of Martha’s Vineyard. We propose to image the Tertiary and Cretaceous units using the portable Scripps high-res MCS streamer (48-channel, 600-m streamer), and Lamont’s portable two generator/injector (GI) gun source, with a compressor capable of a 5-s firing interval. This system is well suited for shallow-water use and provides 2-5 m resolution to a depth of ~1 km. We will simultaneously tow an EdgeTech 512i system (WHOI's), which transmits and records a 0.5-12 kHz swept pulse (or chirp) with a nominal resolution of 10cm and depth of penetration up to 100m, depending on seafloor conditions. We will collect MCS and chirp data along five primary, shelf-perpendicular (dip) lines and at least eight shorter, shelf-parallel (strike) crossing lines. At an average ship speed of 4 kt it will take ~7.5 days to shoot this initial grid given excellent weather. We intend to tow the streamer and guns at 3 m, yielding quality data to 300 Hz. We thus require relatively calm seas, so we include 3 days of contingency time. The MCS data will be processed in real time at sea, producing SEG-Y gathers with geometry and better-than-brute stacks. Velocities for real-time stacking will be based on analyses of USGS Line 5 data prior to MCS acquisition. We will assess the shipboard MCS stacks and the chirp data as they are acquired to determine if the uppermost section is being adequately imaged. If so, we will complete a denser, nearshore grid with chirp lines, or simultaneous chirp and MCS lines if ship turns with the 600-m streamer are faster than we expect. If the nearshore, shallow section is not being adequately imaged with the chirp or the 600-m streamer, 2-gun data (e.g., if the chirp can not penetrate and the MCS resolution is low), we will complete the nearshore grid with 1 GI-gun shooting and a 100-m streamer, towing both at 2 m depth. In this case, it may be necessary to eliminate one pass of crossing lines, but we guarantee crossing lines through each of the proposed drill sites. Completion of the nearshore grid will round out 14 days at sea. Seismic data collection will be conducted in accordance with the requirements of the Marine Mammals Protection Act and the Endangered Species Act. We plan to collect seismic data during fall (2009) to avoid any possible danger to large marine mammals that are known to frequent this area in the spring.
Summary of Facility Requirements: We will require use of a medium-sized UNOLS vessel (e.g., R/V OCEANUS), the portable Scripps high-res MCS streamer (48-channel, 600-m streamer), and Lamont’s portable two generator/injector (GI) gun source, with a compressor capable of a 5-s firing interval.
Summary of other requirements and comments:  
Ship Request Identification
Type of Request: Primary Ship Use Request Status: Submitted
Request ID: 1001870 Created By: Brandon Dugan
Date Last Modified: 2/8/2008 1:13:00 PM Date Submitted: 2/8/2008 1:05:00 PM
Requested Ship, Operating Days and Dates
Year: 2009 Ship/Facility: Oceanus
Optimum Start Date: 8/15/2009 Dates to Avoid:  
Earliest Start Date: 7/15/2009 Multi-Ship Op: No
Latest Start Date: 10/15/2009 Other Ship(s):

Operating Days Needed: Science Days Mob Days De-Mob Days Estimated Transit Days Total Days
14 2 1 0 17
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:
Description of Op Area:
Op Area Size/Dia.:  
  Lat/Long Marsden Grid Navy Op Area
41.5° N / 70.6° W map
152 map
NA06 map
39.8° N / 69.8° W map
115 map
NA06 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
Woods Hole, MA, USA None Woods Hole, MA, USA
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: Brandon Dugan, Rice
# in Science Party 8 # 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
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.

Portable seismic system, using GI-guns from LDEO and 600-m hi-res streamer from SIO.

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)Unselected Ocean Bottom Seismograph Instrument Pool (OBSIP)Unselected Ocean-Bottom Seismometer Program (UTIG)Unselected Other Seismic/OBS Facility
Unselected PASSCALUnselected Portable MCS groupSelected 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.
Portable seismic system, using GI-guns from LDEO and 600-m hi-res streamer from SIO.

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