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Sleipnir is equipped with a third, auxiliary, crane at the opposite end of the ship, near the berths. The whip hoist is capable of lifting 200 t (220 short tons) at a radius between 37 to 153 m (121 to 502 ft) from 100 m (330 ft) below the waterline to 181 m (594 ft) above it at maximum draft. The main cranes are also equipped with a third (whip) hoist. Using the auxiliary hoist, objects can be lifted and lowered from 50 m (160 ft) below the waterline to 165 m (541 ft) above it when SSCV Sleipnir is operating at its maximum 32 m (105 ft) draft. These two large cranes are also equipped with an auxiliary hoist capable of lifting 2,500 t (2,800 short tons) at a radius between 33 to 60 metres (108 to 197 ft). These cranes each use approximately 33 km (21 mi) of braided wire rope, 72 mm (2.8 in) thick. The main hoists were tested to 110% of rated load using the modified barge H-408 during sea trials in June 2019. Objects can be lifted and lowered using the main hoist from 20 m (66 ft) below the waterline to 135 m (443 ft) above it when SSCV Sleipnir is operating at its maximum 32 m (105 ft) draft. Using the main hoist, each crane is capable of lifting a maximum of 10,000 t (11,000 short tons) at a radius between 27 to 48 m (89 to 157 ft) lifting capacity drops to 7,000 t (7,700 short tons) at a radius of up to 62 metres (203 ft), and 4,000 t (4,400 short tons) at 82 m (269 ft) radius the maximum operating radius using the main hoist is 102 metres (335 ft). The large port and starboard cranes were fabricated at Huisman's factory in Xiamen, China, and shipped in pieces to Singapore the BigRoll RoRo ships Baffin (now BigLift Baffin) and Beaufort were used to ferry the crane houses, luffing frames, winch frames and booms along with other large pieces in 2018. Įach luffing frame weighs 1,170 t (1,290 short tons), and each boom weighs 1,465 t (1,615 short tons). The crane house is secured to the foundation using 1,100 bolts 82 mm (3.2 in) in diameter, held in place by nuts weighing more than 40 kg (88 lb). Prior to the cranes for Sleipnir, the largest bearings Huisman had used for tub-mounted cranes were only 12 m (39 ft) in diameter. Conventional tub-mounted cranes ride on bogies or wheels, while the Huisman 10,000t cranes use the bearing directly.

The slewing system, which allows the cranes to rotate in their tub, uses the world's largest bearings at 30 m (98 ft) in diameter. The two large port and starboard tub-mounted cranes are provided by Huisman overall boom length is 144 m (472 ft). Sleipnir outside Aibel in Haugesund, Norway After its completion in 2019, SSCV Sleipnir succeeded Heerema's earlier SSCV Thialf as the largest crane vessel in the world. It was ordered in 2015 and built in Singapore by Sembcorp Marine. The vessel is equipped with two revolving cranes built by Huisman Equipment B.V., each with a capacity of 10,000 t (11,000 short tons) the main cranes can be operated in tandem to jointly lift 20,000 t (22,000 short tons). It is named for Sleipnir, the eight-legged horse ridden by Odin in Norse mythology.

SSCV Sleipnir is a semi-submersible crane vessel (SSCV) owned and operated by Heerema Marine Contractors. 12 × 8 MW dual-fuel engines ( MGO or LNG) Ĩ Wärtsilä azimuth thrusters (4 forward, 4 aft), 5.5 MW each