Naval Air Command Sub Aqua Club

In 2005, NACSAC was closed down as an organization in favour of the Royal Navy Sub Aqua Club, which is what Lieutenant Graham and CPO Larn had wanted from the outset of NACSAC, which was only given that title since HMS Vernon, the RN Diving School at Portsmouth would not support the idea of sport diving within the service.

[citation needed] In the early 1960s, a group of chief petty officers from the Naval Air Command formed amateur diving clubs and mounted annual expeditions.

[2] The club's first chairman was Lieutenant Roy Graham (1924–2007), an engineer officer who had begun his diving career aboard the aircraft carrier HMS Victorious.

[3][4] In 1964 approximately ten NACSAC members - including the shipwreck expert and writer, Chief Petty Officer Richard Larn[5] - arrived on Sicily, they were believed to be only the second group of divers to visit the area.

[3][6] In 1964, 1965, and 1966,[7] The divers could only access the Western Rocks, but barely around the Gilstone Ledge,[3] where a later expedition managed to locate the wreck of HMS Association in 1967.