The vessel is designed by Ulstein International AS in close cooperation with Western Geophysical, and is executed by Ulstein Verft AS as yard no. 226. The UT 743 design is developed in accordance with the demanding requirements for silent operation at high capacity rements for silent operation at high capacity production. The vessel features a compact and efficient layout, providing a comprehensive arrangement of mechanical and electronic seismic outfitting, and a highly flexible, redundant and powerful propulsion and machinery package.

The vessel is built to Det norske Veritas Class + 1A!, ICE-C, E0, HELDK, and to international rules and regulations as applicable for the subject type of vessel. Further the vessel satisfies IMO Res. A.468 (XII) as a general maximum noise level, with additional reduction of noise level in laboratories and related reduction areas. Special consideration has been taken from design stage and throug out the building program in order to minimise hydroacoustic noise generated by the vessel.

Other names: "Marcus G. Langset"

2004: Renamed "Marcus G. Langset"
2017: Still active - IMO 9010137. Owner: National Science Foundation Alaska, Seward AK, USA. Manager: Columbia University, New York NY, USA. Flag: New York NY, USA

MAIN DIMENSIONS
Length over all: 71,5 m
Length between p.p: 61,2 m
Breadth, moulded: 17,0 m
Depth Main Deck: 7,6 m
Design draught: 5,4 m
Scantling draught: 5,9 m

TONNAGE & CAPACITIES
Gross Tonnage 1969) below: 3000 GRT
DW (5,9 m) approx.: 1950 tonnes
DW (5,4 m) approx.: 1500 tonnes
Fuel oil (Ex.sys.tks.) approx.: 1230 m3
WB approx.: 920 m3
FW approx.: 230 m3
Cable oil, clean oil: 20 m3
Cable oil, dirty oil: 20 m3
Work deck area (Main deck): 740 m2 ((8000 sq.ft)
Recording room area: 200 m2
Helideck: CAA/DnV. AS 332 Super Pumpa

ACCOMODATION
Accomodation 48 persons in total, of which:
- 5 suits with dayroom, bedroom and bathroom
- 5 two-man cabines
- 16 two-man bedrooms attached to dayrooms
- 1 two-bed hospital

PERFORMANCE
Trial Speed (4,5 m): 15,7 knots
Design pull, 5 kn. 30 tonnes
Max. pull, 5 kn: 50 tonnes

TECHNICAL DATA
Bergen Diesel, main engines 2 x BD 32 M6 each of 3300 BHP at 750 rpm
Ulstein Propeller Twin Screw propulsion, comprising: 2x1500 AGSC controllable pitch propulsion plants, each with: Low noise
4-bladed scewed CP-propeller, driven through a reduction gearbox with two-speed PTO for shaft generator
Ulstein Propeller, bow thruster: 150 TV, 800 Hp, el. driven
Ulstein high lift rudders: 2 off
Shaft generator 2 x 1665 kVA, 450 V, 60 Hz
Aux.generator: 1 x 900 kVA, 450 V, 60Hz driven by one Cummins KTA 38 G1 diesel engine, rated at 1030 HP at 1800 rpm
Clean power: 2 x 78 kVA, 230 V, 60 Hz
Air compressors: 2 x Eureka / Ariel 2725, 2725 SCFM, 2000 psi, driven by Caterpillar 3516 Diesel engine

LIFE BOATS
2 x 48 person Enclosed
Life rafts As per Solas
MOB boat 1 x Seabear 23, with inboard diesel. Crane deployed
Work boat 1 x Seabear 23, with inboard diesel. Davit deployed
Norwinch Windlass: Type AV-33/38-36 K3
Ulstein Marine Electronics: Switchboards
- Electronic remote control system. Main Propeller (PROCON)
- Joystick control system (POSCON)
- Electronic remote control system. Bow thruster (SITCON)
- Bridge control consoles
- Engine room console
- Starters (for el. motor)
- El. test board
- Engine room telegraph
- Microprocessor based alarm system (with dead man system and printers)

ELECTRONIC EQUIPMENT
Radar: Furuno FAR-2822, XBand ARPA-, 120 NM Rang x-band (3 cm), ARPA, 72 miles
Radar: Furuno FAR 28305, SBand ARPA 96 NM Range
Inmarsat: JRC JVE 45A MKII Voice/Telex/Fax
Radio (to FMDSS Requirements). Skanti TRP8150DS Duplex SSB MF / HF, 750 watt
Skanti TT3200 Radio Telex System
Skanti RS7100DX VHF Duplex (2)
Skanti VHF Simplex (1)
Skanti TR6102 Ground to Aircraft (AM/VHF)
Panasonic 450 MHZ Cellular Telephone
Skips Navigation: Tokyo Keiko Gyrocompass System
Robertson AP9 MKII Autopilot
Furuno FSN-50 Transit Satelite RCVR
Furuno GP500 GPS Satelite RCVR
Furuno LC 90 MKII Loran CRCVR
Furuno FD 525 VHF Direction Finder
Furuno TDC-318 mF/HF Direction Finder
Furuno FE 680 Echo Sounder - Range to 2100 metres
Furuno Fax 208A Weather facsimile RCVR Ben Marine
Electronmagnetic Log
Trane & Trane standard C Inmarsat (telex)

Yno 226 - Western Legend