A tip to the unitiated.......
www.google.com , when searching, put your enquiry in " " which restricts the search. after this "OASC" insert a plus sign, e.g. "OASC" + RAF and lo and behold, the very first url that comes up is...
http://www.airmenaircrew.freeserve.c...c/oasc_pp1.htm
Which contains something, that i had in pamphlet form back in 1980 , when OASC was at an airfield that stirred the loins
Tony