Yno 248 - Fresnel (Demeter Acacia)
Built in 1997 by Ulstein Verft AS for Care Offshore. The UT 736 Large Platform Supply / Cable Laying Vessel was designed by Ulstein Industrier AS, dept. Ulstein International to provide large operational flexibility for offshore services and cable-laying operations.
Primary specifications as built
Additional Data
Specifications at delivery
PERFORMANCE
Bollard pull (continuous part load 80%) approx. 80 t
Trial speed (d = 6,0) approx. 15,1 knots
ACCOMMODATION
The accommodation in general is spacious and especially well noise-insulated.
Accommodation for 70 persons in total of which:
- 28 single cabins
- 21 double cabins
- 2 day rooms
- 1 mess room
TECHNICAL DATA
Deck Cranes
- Two offshore rated, telescopic deck cranes, 5 tonnes at 16 metres
Liquid Cargo Discharge Systems
- One fresh water pump
- One ballast/drill water pump
- One fuel oil pump
Side Thrusters
- Two ULSTEIN Tunnel Thrusters forward, each of 883 kW
- One ULSTEIN Swing-up Compass Thruster forward, 883 kW
Roll Damping System
- ULSTEIN Passive Roll Damping System
Manoeuvring/Positioning
- Dynpos/Joystick system according to DnV Dynpos (AUT) Reference systems: HPR, DGPS
Navigation / Communication
- S-band and X-band ARPA radars
- Two Gyro compasses
- Autopilot
- Doppler and Electromagnetic Log
- Three GPS
- Radio Installation according to GMDSS-A3 with Inmarsat B and C
- VHF and UHF radios
Deck Machinery
- One ULSTEIN Windlass/Mooring Winch, 16,8 tonnes
- Two ULSTEIN Capstans, 8,0 tonnes
Lifesaving Equipment
- Two lifeboats, each of 70 persons
- One rescue/workboat
- Six inflatable liferafts, each of 25 persons
Misc. Accommodation Facilities
- "French kitchen"
- Advanced high performance HVAC plant
- Toilet and shower for all cabins
- Vacuum toilet plant
- Sewage treatment unit
Separator Plant
- One fuel oil separator
- Three lubricating oil separators
Diesel Electric Propulsion System
- Three ULSTEIN Main Diesel Generator Engines, each of 3775 kW
- Two ULSTEIN Azimuth Compass Thrusters with built-in steering gears and reduction gears
- Two 2-speed AC electric motors, each of 3300 kW-6600 V
Electric Power Plant (6600 V - 60 Hz / 440 V - 60 Hz)
- Three main generators, each of 3625 kW
- Two harbour generators, each of approx. 450 kW
- One emergency generator, approx. 100 kW
- Two transformers, 6600 V/440 V - 1600 kVA
- Main switchboard, 6600 V
- Switchboard, 440V/220V
- Emergency switchboard, 440V/220V
- Power management system
Electric Equipment
- ULSTEIN Control Consoles and general Electrical Equipment
- ULSTEIN Alarm System (UMAS)
- ULSTEIN Tanktender
- ULSTEIN Datasound
- ULSTEIN Bridge Alarm System
- ULSTEIN Engine Telegraph
- PABX telephone system
- PA-system
- Common TV/Radio antenna distribution system
- Addressable fire alarm system Fresh water generators
- Two FW generators, each of 20 tonnes/day
Incinerator
- One incinerator 500.000 kcal/h
Ship history
2003: Renamed: "Toisa Pisces"
2016: Owner: Sealion Shipping, Farnham UK. Flag: Monrovia, Liberia. The current 'Toisa Pisces' is a Liberia-flagged well test and servicing vessel. She is classified by Det Norske Veritas as an oil production and storage unit.
2026: Utility ROV Services (UTROV) has confirmed plans to convert the former cable‑lay and well testing vessel Toisa Pisces, currently known as Demeter Acacia, into a light construction support vessel for the decommissioning and offshore renewables markets. The 1997‑built Ulstein UT 736‑designed vessel is being towed from lay‑up in Mobile, Alabama, to a Polish yard for life extension and conversion. The vessel will be equipped with a UTROV subsea deployment system, material‑handling cranes and a 4,000‑tonne cargo capacity, with completion planned for Q4 2027. It will be renamed UDV Redeemer.