The vessel is designed by Ulstein International AS in close cooperation with Western Geophysical, and is excuted by Ulstein Verft AS as yard no. 233. The UT 743 design is developed in accordance with the demanding requirements 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 + A1, 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 in laboratories and related areas. Special consideration has been taken from design stage and through out the building program in order to minimise hydroacoustic noise generated by the vessel. All major roating machinery installations are resiliently mounted, and vibration characteristics of the steel structure and hull is made without interference from machinery and propulsion plant.

2017: Still active - IMO 9050448 Manager and owner: Westerngeco, London, UK. Flag: Panama

MAIN DIMENSIONS
Length over all: 78 m
Length between p.p.: 67 ,7 m
Breadth, moulded: 17,0 m
Dept Main Deck: 7,6 m
Design draught: 5,4 m
Scantling draught: 5,9 m

TONNAGE & CAPACITIES
Gross Tonnage (1969) approx.: 3700 GRT
Fuel oil (Ex.sys.tks.) approx.: 1400 m3
WB approx.: 850 m3
FW approx.: 220 m3
Cable oil, clean oil: 20 m3
Cable oil, dirty oil: 20 m3
Work deck area (Main deck): (8000 sq.ft) 740 m2
Recording room area: 200 m2
Helideck AS 332 Super Pumpa. CAA/DnV

ACCOMMODATION
Accommodation 56 persons in total, of which:
- 18 one-man cabines
- 18 two-man cabines
- 1 two-bed hospital

PERFORMANCE
Trial Speed (4,5): 15,6 knots
Design pull, 5 kn: 30 tonnes
Max.pull, 5 kn: 50 tonnes

TECHNICAL DATA
Bergen Diesel, main engines: 2 x BD 32 M& each of 3300 BHP at 750 rpm
Ulstein Propeller: Twin screw propulsion comprizing:
2 x 1500 AGSC controllable pitch propulsion plants, each with:
Low noise, 4-bladed secwed CP-propeller, driven through a reduction gearbox with two-speed PTO for shaft generator
Ulstein Propeller, bow thruster: 150 TV, 590 kW/800 HP, el.driven
Ulstein high lift rudders: 2 off
Shaft generator: 2 x 2000 kVA, 450 V, 60 Hz
Aux.generator: 1 x 1338 kVA, 450 V, 60 HZ, driven by one
Caterpiller 3512 TA, diesel engine, rated at 1125 HP at 1800 rpm
Clean power: 2 x 73,6 kVA, 208 V, 60 Hz, SCFM, 2000 psi, driven by Caterpiller 3516 Diesel engine
Life boats: 2 x 48 persons enclosed
Life rafts: As per Solas
MOB boat: 1 x Seabear 23, with inboard diesel. Davit deployed
Work boat: 1 x Seabear 23, with inboard diesel Davit deployed
Norwinch Windlass: Type AV-33/38-36 K3
Ulstein Maritime Electronics: Switchboards
- Electronic remote control system
Main Propeller (PROCON)
- Joystick control system (POSCON)
- Electronic remote control system
- Bowthruster (SITCON)
- Bridge control consoles
- Engine room console
- Starters (for el.motors)
- El.test board
- Engine room telegrahp
- Microprocessor based alarm system with dead man system and printers)

ELECTRONIC EQUIPMENT
Radar: Furuno FAR-2822/XBand, ARPA - 120
NM Ranger x-band (3 cm), ARPA, 72 miles
Radar: Furuno FAR 2830S, SBand ARPA-96 NM Range
Innmarsat: JRC JUE 45A MKII Voice/Telex/Fax
Radio /to GMDSS Requirements): Skanti TRP 8750 Duplex SSB MF/HF, 750 watt
Thrane & Thrane TT3200 Radio Telex System
Sailor RT2047 radiotelphone, simlpex and duplex operation
Skanti VHF radiotelephone TRP 3000 simplex/semiduplex
Skanti TR6102 areonautical AM/VHF
Skanti DSC VHF radio, TU 3000/XH 5131
Ships Navigation: Robertson Gyrocompass RGC 11
Robertson disc navigation system ECDIS
Robertson AP9 MKII Autopilot
Furuno FSN-50 Transit Satelite receiver
Furuno GP500 GPS Satelite receiver
Furuno LC 90 MKII Loran C navigator
Furuno FD 527 VHF Direction Finder
JMC MF/HF Direction Finder, DR-230
Furuno FE 680 Echo Sounder - Range to 2100 metres
Furuno Fax 208A Weather facsimile
Ben Marine Electronmagnetic Log
Thrane & Thrane standard C inmarsat (telex) system TT 3000 C

Yno 233 - Western Patriot