HMS Challenger (K07)

History
United Kingdom
Name	HMS Challenger
Ordered	9 October 1979
Builder	Scotts Shipbuilding and Engineering Company, Greenock
Launched	19 May 1981
Commissioned	1983
Decommissioned	1990 (Royal Navy)
Fate	Sold, 1993
Notes	In Royal Navy Service, equipped with a Towed Unmanned Submersible (TUMS), and could carry and deploy LR5 submarine rescue submersible.
Namibia
Name	MV Ya Toivo
Namesake	Andimba Toivo ya Toivo
Operator	NAMCO (2000-2003); De Beers (from 2003);
Acquired	2000
In service	December 2000
Identification	IMO number: 7907697
Status	In active service
Notes	Fitted out and operated as a mining vessel (seabed diamond extraction)
General characteristics (as built)
Type	Seabed Operations Vessel
Displacement	6,500 t (6,397 long tons) standard; 7,185 t (7,072 long tons) full;
Length	134.1 m (440 ft 0 in) o/a
Beam	18 m (59 ft 1 in)
Draught	5 m (16 ft 5 in)
Propulsion	Diesel-electric; 5 × 6,200 shp (4,623 kW) RKC Ruston 16-cylinder diesel engines, coupled to 2,500 kW alternators driving electric motors (main propulsion); 2 × 6RKC diesel engines (auxiliary power); 2 × Voith Schneider Propellers aft; 3 × bow thrusters;
Speed	15 knots, approx.
Complement	185
Sensors and ; processing systems	Sonar: Plessey Type 193M
Aviation facilities	Helicopter deck (in Namibian service)

HMS Challenger (pennant number K07) was a Royal Navy diving support vessel, operational from 1984 to 1990.

Challenger had a saturation diving system allowing 12 divers to live in relative comfort in a large diving chamber amidships.

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