Subs became a regular posting in 1988 shortly after the boats had to be tied up for lack of qualified people. Manning was a real mess in the mid-eighties. It actually happened to people that as soon as their boat tied up from a cruise, they were ordered to grab their kit, trot down the jetty to get on the next boat so it could put to sea. I was lucky, it only happened to me once.
Not that I am bitter, but I will never forget the squadron meeting called in late 86 so an admiral and his posse from Ottawa could order us to stop complaining, they had the proof that the average posting to subs was 18 months. There was four of us PO's sitting in a row that all had over 5 years straight time on the boats. I was standing 1 in 5 home port duty watches at the time, we were so short of qualified stokers, so when my career mangler told me later that afternoon that he had no idea when I could expect a posting out of the sub sqadron, I started working up my release letter.
Spring of 88, the fecal matter hit the rotary air impeller, couple of court martials, it went public, the boats got tied up for a while, some brass got shuffled to desk jobs, the navy bought a habour queen from the brits for training, and subs became non-voluntary.