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Capabilities of the Marcus G. Langseth MV Western Legend

The Marcus G. Langseth MV Western Legend is a research vessel with advanced capabilities for multichannel seismics. This includes a multistreamer 3D capability, linear source arrays management, and national oversight. The vessel is equipped with various decks and instruments for data collection, such as streamers, air gun arrays, and towing umbilicals. Additionally, the vessel has comprehensive navigation systems and communication capabilities, including satellite and internet connectivity. It also has the ability to conduct swath bathymetry and marine mammal observation.

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Capabilities of the Marcus G. Langseth MV Western Legend

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  1. Capabilities of the Marcus G. Langseth

  2. MV Western Legend, Quonset Pt, RI

  3. R/V Marcus G. Langseth, 2006

  4. Marcus G. Langseth, 1932 – 1997

  5. R/V LANGSETH • Principal mission is multichannel seismics in support of NSF-funded science. • What’s new? • National Facility Status • Multistreamer 3D Capability • Linear Source Arrays

  6. Management & National Oversight Ewing Replacement Oversight Conversion Committee Marine Operations Working Group Marcus Langseth Science Oversight Committee

  7. Helicopter Deck Paravane Deck Streamer Deck Gun Deck

  8. Total Spread 150m – 600m, CDP line spacing 12.5m – 50m

  9. Streamers: • 4 x 6 km x 12.5m Thales [Sercel] solid state “Sentry” • Separations = 50 to 200 meter, for CDP spacing between 12.5 and 50 meters • Western Geoph. Tailbuoys • Digicourse Birds, Sonardyne Acoustic modules

  10. Streamers – 4 x 6 km, solid state

  11. Linear Air Gun Array Tubular Float Support Cables Towing Umbilical Chain Bell Housing Towing Plate Cable / Hose Harness Cluster

  12. R/V Langseth 3D Source array 2 x 10 – element strings, 15m x 10m, 3300 cu. in.

  13. Seismic Source Handling – Umbilical Winches

  14. Source Array Handling - Trolleys

  15. Determining Acquisition Geometry • Compass Birds • Source head buoy and streamer tail buoy GPS • Acoustic network

  16. 3D MCS Navigation Spectra – Nav capture, realtime QC & logging Sprint – Nav QC, post-processing Reflex – Binning & Binning analysis

  17. 3D MCS Navigation • Spectra – Nav capture, realtime QC & logging • Sprint – Nav QC, post-processing • Reflex – Binning & Binning analysis

  18. Added Personnel for 3D surveys Senior Science Officer/Party Chief Contract Navigators

  19. Cruise Planning http://www.ldeo.columbia.edu/res/fac/oma/3D_Seismic/3Dcapabilitiesandcruiseplanning.html

  20. Other Capabilities

  21. Main Lab

  22. Communications: • VSAT/HiSeasNet • Inmarsat F & B • Cisco Router/firewall • Fulltime connectivity => voiceover IP, Video, • Educational support

  23. Swath Bathymetry Simrad 120 – 12kHz 1o x 1o with future upgrade to 122

  24. Marine Mammal Observation

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