Thialf, our largest deepwater construction vessel (DCV), is capable of a tandem lift of 14,200 t (15,600 short tons). Its two cranes provide for a depth reach lowering capability as well as a heavy lift capacity to install topsides. This multi-functional dynamic positioned DCV is customized for the installation of foundations, moorings, SPARs, TLPs, and integrated topsides, as well as pipelines and flowlines.
| Length overall | 201.6 m | 661 ft |
| Length of vessel | 165.3 m | 542 ft |
| Width | 88.4 m | 290 ft |
| Depth to workdeck | 49.5 m | 162 ft |
| Draught | 11.8-31.6 m | 43-104 ft |
| GRT | 136,709 t | - |
| NRT | 41,012 t | - |
Accommodation / Helicopter Deck
The living quarters are equipped to accommodate 736 men. All quarters have heating and air conditioning facilities. The helicopter deck is suitable for a Boeing Chinook 234.
Life-saving / Fire-fighting Equipment
Thialf has life-saving and fire-fighting equipment in accordance with the latest governmental requirements.
Mooring System
12 Delta Flipper anchors of 22.5 t each, on 3 1/8" wire ropes of 2,400 meters (8,000 ft) long. Minimum breaking strength 480 t. Kongsberg Albatross ADP 503 and ADP 311 automatic and dynamic positioning and mooring assistance.
Diving System
Containerized saturation diving system with diving bell can be made available.
Port Side Crane & Starboard Crane
| Main hoist revolving | 7,826 st | up to 31.2 m (102 ft) |
| Auxiliary hoist | 1,000 st | 36.0-79.2 m (120–260 ft) |
| Whip hoist | 220 st | 41.0-129.5 m (134-425 ft) |
Main Hoist Lifting Height
95 m (312 ft) above work deck for each crane. Lowering depth of auxiliary hoists 460 m (1,500 ft) below work deck at minimum radius.
Main Hoist Plumbing Depth
The lowering depth of main hoist at minimum radius with 3,500 t is 307 meters below heel point and with 2,990 t, 351 meters below heel point. Heel point is 24.4 meters (80 ft) above work deck.
Tandem Lift
Main hoist 14,200 t (15,600 st) at 31.2 meters (102 ft) radius (subject to stability calculations).
Ballast System
Ballast pump capacity 20,800 cubic meters/hour.
Dynamic Positioning System
Thialf is equipped with a Class III Dynamic Positioning system with the following characteristics:
Thrusters:
6 x 5,500 kW - 360 degrees azimuth, total thrust 400 t.
Modes of operation
- Manual
- Joy-stick
- Auto-pilot
- Full DP mode
- Position mooring
Special DP functions
- Track follow
- Heavy lift
- Follow floating object
- External force compensation
Position reference systems
- 2 x satellite DGPS
- 1 x mechanical taut wire (300 m)
- 1 x Artemis
- 2 x acoustic SSBL/LBL
- 1 x Fan-beam laser
Transit speed with 1 tug max. 7.0 knot at 12.5 m draft.
Deck Load / Transit Speed
- Deck load capacity 15 t/m²
- Total deck load capacity 12,000 t
- Transit speed with 12,000 tons deck load 6 knots at 12.5 meters (43.6 ft) draft.