236 OCU
I was a student AEOp on the first "long" Nimrod Mk1 course, at St Mawgan, and my log book (first flight Jan 4 1970) shows the Unit as 236 OCU. Maybe the short courses were done by a MOCU, as they changed over to the Nimrod. Didn't MOTU have a war role as 220 Sqn?