242 OCU
Aircrew courses weren't all that frequent either as I recall. After Canberras I attended 242 OCU twice in 50 years. 1965 at Thorney for Argosies (3 tours) then in 1975 at Lyneham for Hercules (8 tours). I stopped flying Auntie Betty's Alberts with the Auggies in 2006 and I still had my tatty OCU notes full of climatology and gyro navigation.