Yno 232 - Western Regent

Hull No. 232 built 1992 by Ulstein Verft AS. The UT 747 seismic research vessel was designed by Ulstein International AS in close cooperation with Western Geophysical Company, a subsidiary of Western Atlas International Inc.

Yno 232 Western Regent

In 1992, the UT 747 concept had been designed in compliance with advanced and demanding requirements, setting a new dimension into the industry. The design provided an extremely stable and silent working platform, comprising provision for comprehensive seismic equipment packages and spacious computer processing facilities. The vessel is powered by a centralized diesel electric power plant, propulsion and compressors are all electrically driven, giving a high level of availability and redundancy. Hydro acoustic noise is carefully controlled. Special measures were taken from the design stage and throughout the building program in order to ensure the very low noise level. All major rotating machinery installations are resiliently mounted, and vibration characteristics of the steel structure and hull is made without interference from machinery and propulsion plant.

Ship history

2016: Still active - IMO 9017757. New name: 'Elsa Regent'. Owner Westerngeco, London, UK. Manager: Westerngeco, Tanager, Norway. Flag: Panama

Ship characteristics at time of delivery:

The vessel is built to Det norske Veritas Class +1A1, 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 areas.

Length over all 92,5 m
Length between pp 80,0 m
Breadth moulded 20,0 m
Depth Main Deck 9,0 m
Design draught 6,4 m
Scantling draught 6,9 m

Gross tonnage (1969) below 5200 GRT
DW (6,4 m) approx 2250 tonnes
DW (6,9 m) approx 2925 tonnes
Fuel oil (Incl. tks) approx 1600 m3
WB approx 995 m3
FW approx 150 m3
Cable oil, clean oil 20 m3
Cable oil, dirty oil 20 m3
Work deck area (Main deck) 1175 m2 (12650 Sq.ft)
Recording room area 273 m2
Helideck CAA/DnV

Accommodation 61 persons in total, of which:
- 5 suits with dayroom, bedroom and bathroom
- 2 one-man cabins
- 16 two-man cabins
- 11 two-man bedrooms, attached to day rooms
- 1 two-bed hospital

Trial Speed (5,5 m) 16,0 knots
Design pull, 5 kn 40 tonnes

Bergen Diesel
Main gen sets 3 x BD 32 G8, each of 3200kW/6600V/60Hz

Ulstein Propeller
Twin screw propulsion comprimizing 2 x 2500 AGSC-2T
Controllable pitch propulsiion plants, each with Low noise, 4 bladed scewed CP-propeller, driven through a single input, single output reduction gearbox.
1 off Bow thruster 150 TV, 800 Hp el. driven
2 off High lift rudders
2 off Passive stab tank sys.
2 off Main Propeller motors 2700kW/6600/60Hz 2-speed
1 off Aux generator Cummins 600kW/6600/60Hz
2 off Clean power 60 kW/230V/60Hz
3 off Air compressors, El-driven Ariel capacity 2200 SCFM
2 off Life boats, 61 persons Life rafts as per Solas
1 off MOB 23
1 off Work Boat

Windlasses: Type AV-45/50-4G K3

Ulstein Marine Electronics
Electric remote control system main Propeller
Joystick control system
Electronic remote control system
Bow thruster
Bridge control consoles
Engine room console
Starters for e.motor
El-test board
Engine room telegraph
Microprocessor based alarm system (with dead man system and printers)
Roll indicator

Radio Equipment
Inmarsat JRC JUE 45A MKI Voice/Telec/Fax
Skanti TT 32oo Radio Telex System
Skanti 3000 (2)
Skanti RT 2047
Jotron Ground to Aircraft
Panasonic 450 MHZ Cellular Telephone
Trane & Trane standard C inmarsat

Navigation / Equipment
Radar Furuno FAR-2822 X-band
Radar Furuno FAR 2830S S-band
Tokyo Keiko Gyrokompass system
Roberson AP9 MKII Autopilot
Furuno FSN-50 Transitt Satelitt
Furuno LC GP500 GPS Satelitt
Furuno FD 525 VHF
Furuno TDC-318 Direction Finder
Furuno Fax 208A Weather faxmile RCVR
Ben Marine Electromagnetic Log