STO was Survival to Operate … at least it was in the 90s when I was Wg Cdr STO in the Deputy Directorate of War Plans and Policy (WPP) in the Air Force Department (AFD) at the Ministry of Defence (MOD).
Then the Warsaw Pact (WP) and Soviet Union collapsed, and we were disestablished with on-going work passed to Strike Command (STC) where I suspect it largely withered on the vine.
Falklands 1983 had the SS Rangatira moored in Stanley harbour for accommodation purposes, with a Naval Lt as the military “OC”. We sailed down on the SS Uganda together, and as the Senior Naval Officer on the Rangatira we RAF types awarded him the informal title of SNOTRAG.