HSwMS Castor (T124)
HSwMS "Castor" (T124) was a Swedish Navy "Spica"-class, torpedo-armed, fast attack craft (FAC). Design. The hull was made of steel, unlike some other contemporary designs which used plywood. Although the boat had a relatively small hull and displacement, this provided a stable platform. The Bridge and Operations Room were located at the rolling and stamping centre of the ship which further improved stability for the crew especially in high seas. The boats were fitted with a NBC support system where the hull could be closed down in the event of having to operate in a nuclear  fall-out area. Construction and career. The vessel was one of three constructed in the 1960s by Karlskronavarvet, the other two being HSwMS "Vega" (T125) and HSwMS "Virgo" (T126). Three similar vessels were built by Götaverken AB at Hisingen. She was launched on 25 October 1965. The vessel was taken out of service in 30 June 1985.