In 1957 he became a BSAC member , and served as BSAC Deputy Diving Officer in 1961 and 1962 . Larn was also among the instigating members of the Naval Air Command Sub Aqua Club ( NATSAC ) , the Royal Navy Sub-Aqua Club , which was established in the early 1960s with Lieutenant Roy Graham as its first chairman , and Larn as its Diving Officer . One of the club 's first major projects , initiated by Larn 's extensive research into the Scilly naval disaster of 1707 , was to send a team of Royal Navy divers , based on board the minesweeper HM/XSV '' Puttenham '' , to the Isles of Scilly off the coast of Cornwall to find an historic fleet of sunken Royal Navy ships , led by HMS '' Association '' , a 90-gun Second Rate Ship of the Line lost in the 1707 disaster . In 1964 about ten NACSAC members , including Larn , arrived on Scilly – thought at that time to be only the second group of divers ever to come there . Their initial dives sparked off a long chain of navy visits that continued for four years . The annual expedition in 1966 was announced as a search for the wreck of the '' Association '' . Plans to find it had existed before , but until then the dives in the Isles of Scilly had largely discovered modern wrecks . The divers could only get out to the Western Rocks , but hardly around the Gilstone Ledge , where a later expedition managed to locate the wreck of the '' Association '' in 1967 ; Larn was not present in 1967 having been given a " pier-head jump " at the last minute to HMS '' Bulwark '' in Singapore . However , on his return he led NACSAC for its 1969 , 1970 and 1971 expeditions to the islands , before leaving the Royal Navy
Scilly naval disaster of 1707
Scilly naval disaster of 1707
Richard Larn