Ship Request

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  Aleutian Megathurst  -  2011  -  Marcus Langseth  
  Project Information  
Project Title: Megathrust seismic hazards by reflection mapping Project Status: Submitted
Principal Investigator: Donna J. Shillington, LDEO Project Institution: LDEO
Project ID: 101873 Version #: 3
Date Submitted: 2/6/2009 3:45:00 PM Created By: Donna J. Shillington
Date Last Modified: 7/14/2010 1:09:00 PM URI Serial #: None
Funding Agencies: NSF/OCE/MGG - 0926614 - Funded
Summary of Field Work: The objectives of this experiment are to image the reflection characteristics of the megathrust in the Aleutian/Alaska subduction zone in order to understand downdip changes in processes and physical properties at the slab interface. Seismic reflection data will be acquired along 5 profiles with two 8-km streamers and the 6600 cu in source of the Langseth. Wide-angle seismic refraction data will be acquired along two profiles with OBS spaced at ~15-16 km along two profiles to constrain crustal velocity structure. OBS acquisition would occur separately from MCS acquisition during the second half of the program. We propose to make a port call at Sand Point in the middle of the cruise to drop off MCS personnel and pick up OBS engineers. We estimate that the entire program including the stop and contingency time would require 33 days.
Summary of Facility Requirements: For this project, we require the seismic capabilities of the R/V Langseth, as described above.
Summary of other requirements and comments:  
Ship Request Identification
Type of Request: Primary Ship Use Request Status: Submitted
Request ID: 1002692 Created By: Donna J. Shillington
Date Last Modified: 7/14/2010 1:09:00 PM Date Submitted: 2/6/2009 3:45:00 PM
Requested Ship, Operating Days and Dates
Year: 2011 Ship/Facility: Marcus Langseth
Optimum Start Date: 7/1/2011 Dates to Avoid: Given the region of the experiment (offshore Alaska), we would prefer to conduct the cruise in the middle of the summer if possible for best weather conditions.
Earliest Start Date: 6/1/2010 Multi-Ship Op: No
Latest Start Date: 8/31/2010 Other Ship(s):

Operating Days Needed: Science Days Mob Days De-Mob Days Estimated Transit Days Total Days
30 0 0 3 33
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:
Alaska, USA
Description of Op Area: Along Aleutian trench between Kodiak and Sand Point, Alaska
Op Area Size/Dia.: 165000 nm2 area, 300 nm diameter
  Lat/Long Marsden Grid Navy Op Area
55° N / 152° W map
196 map
NP06 map
55° N / 160° W map
197 map
NP05 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
Kodiak, AK, USA None Kodiak, AK, USA
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops
We also request an intermediate port in Sand Point Alaska, which does not appear in the UNOLS port list. The purpose of this port call would be a personnel exchange (offload MCS personnel and bring OBS engineers onboard).

 Important Info on Working in Foreign Ports

Science Party
Chief Scientist: Donna J. Shillington, LDEO
# in Science Party 13 # of different science teams 2 # Marine Technicians to be
provided by ship operator:
(include in science party total)
Explanation of Science Party Requirements and Technician Requirements The scientific party comprises 4 scientists (Shillington, Nedimovic, Diebold, Webb) and 5 students. I've also included an estimated 3 OBS engineers in this total.
Instrumentation Requirements That Impact Scheduling Decisions
Selected Dynamic PositioningUnselected ADCPSelected 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.

The Langseth is the only ship that has the seismic capabilities required for our program. We plan to use 2 8-km-long streamers and the tuned air gun source of the Langseth.

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 submitted a request to OBSIP for 21 short-period OBS. Our proposal calls for two deployments of all instruments. Although we propose to bring OBS engineers onboard at Sand Point, we propose to load OBS onto the ship at the beginning of the cruise in Kodiak unless the required OBS are onboard already from a previous program.

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