R/V Marcus
G. Langseth
Seismic Shakedown cruise reports
East Pacific Rise 3D survey
The R/V Marcus G. Langseth
is a 235 ft, 3834 gross ton research vessel which is owned by the
National Science Foundation and operated by Lamont-Doherty Earth
Observatory of Columbia University. Langseth
replaces R/V Maurice Ewing,
which ended a distinguished career in early 2005.
Langseth
is classed by the American Bureau of Shipping as A-1 Baltic
Ice Class IA and Coast Guard inspected; certificated to carry a
total of 55 personnel of which approximately 20 are the ship's crew.
R/V Marcus G.
Langseth began science operations offshore Costa Rica
during February - March, 2008.
Originally constructed
as a seismic vessel the Langseth was acquired in 2004, modified,
and outfitted to perform the tasks required of a general purpose
research vessel. This includes hull mounted 3.5 and 12 khz transducers
and a Simrad 1x1 degree deep ocean multibeam swath bottom mapping
system.
Over the side sampling
capabilities include 25 MT SWL starboard a-frame serving four winches
carrying 10,000m of 9/16" 3x19, 0.680" coaxial cable,
0.322' CTD wire, or 1/4' 3x19 wire.
Particularly unique to
the academic research vessel are the Marcus Langseth's extensive
geophysical capabilites which include a Syntrak 960-24 seismic recording
system with four 6km solid-state hydrophone streamer cable and a
2000 psi, 40 pneumatic sound source array towed in four "strings"
that can be configured either as a single, 2D source or dual, alternating
3D source arrays.
Specifications
Built:
|
1991
|
Speed
Cruising: |
11kts
|
Yard Built:
|
Ulstein (Norway)
|
Speed Full:
|
13kts |
Length (LOA)
|
71.5m/ 235
ft |
Speed working:
|
0-11 kts |
Beam(moulded):
|
17.0m/
56 ft |
Endurance
|
Job dependent
|
Draft(max):
|
5.9m/ 19.5ft
|
Range |
13,500 nm
|
| Gross Tonnage:
|
3834 |
Fuel capacity
|
1340m3 (353760
gal) |
| Lightship
Displacement: |
2578.4 |
Fuel Type;
|
Marine Gas
Oil |
| Crew |
20 |
Bollard Pull
|
86.2 mt |
| Scientific
Personnel: |
35 |
Laboratory,
existing: |
|
| Call Sign
|
WDC6698 |
Seismic Lab
|
218 m2/ 2345
ft2 |
| IMO Number;
|
9010137 |
Other labs |
|
| Registration:
|
NY3360FG |
Main Dk Stbd
Dry Lab |
53 m2/570
ft2 |
| |
|
Main Dk Stbd
Wet Lab |
57 m2/613
ft2 |
| |
|
Main Deck
Pt Dry Lab |
54 m2/ 581
ft2 |
| |
|
A-Deck Fwd
Dry Lab |
22 m2/ 237
ft2 |
| |
|
A-Deck Aft
Dry Lab |
21 m2/ 226
ft2 |
| |
|
|
|
| Propulsion
|
Geared Diesel
|
Propeller
|
2 x Ducted
Variable Pitch |
| Main Engines
|
2 x
Bergen BRG-6 |
|
Ulstein 4
blades |
| |
2650kw /3550
hp (each) |
Rudder |
2 x High Efficiency
|
| Main Generators
|
2 x Shaft
Generators |
|
Becker Articulated
|
| |
1665 KVA
each |
Seismic Air
Source |
2 x Ariel
JGK4 |
| Harbor Generator
|
1 x Diesel
Generator 720 kw |
Seismic Air
Capacity |
2750 CFM @
1950 psi each |
| Bowthruster
|
1 x Tunnel
590 kw/ 800 hp |
|
|
| |
|
|
|
| Ownership
|
The
National Science Foundation |
| Operator |
Lamont-Doherty
Earth Observatory of Columbia University |
| Classification:
|
ABS-
A-1, Ice Class 1C, AMS |
|
|
|
|
|
Science
equipment
| MCS Acquisition |
Syntrak 960-24 |
Communications |
HighSeasNet |
| |
3590E & RAID
via SeisNet |
|
Inmarsat B |
| Hydrophone arrays |
Sentry solid state |
|
Inmarsat F77 |
| |
12.5 meter groups
|
|
Iridium |
| |
150m sections |
Multibeam |
Simrad EM120/122
1º x 1º |
| |
up to four towed
|
Marine Mammals |
SeaMap PAM |
| |
separation 50 -
200 meters |
|
2 x Fujinon Big Eye Binoculars
|
| Source Arrays |
4 x 10 gun strings |
General |
Bell BGM-3 Gravimeter |
| |
9 active, one spare
/ string |
|
Geometrics 886 Magnetometer |
| |
15 meter string
length |
|
RDI 150kHz ADCP |
| |
1650 cu. In. per
string |
|
Lebus 9/16" Trawl winch |
| Source Controller |
DigiShot |
|
Lebus 0.322" CTD winch |
| MCS geometry sensors |
Digicourse 5011 Compass/depth
|
|
Lebus 1/4" hydrographic
winch |
| |
Sonardyne SIPS1 |
|
Stbd Side A frame |
| |
Tailbuoy GPS |
|
Telescoping Stern Boom |
| |
Source String GPS |
|
Sparton XBT system |
| MCS Navigation |
Spectra, Sprint, Reflex |
|
Flow through Seawater |
| MCS QC |
Syntrak |
|
|
| |
SeisNet |
|
|
| |
ProMaxx |
|
|
| |
Focus |
|
|
|
