Manston, early seventies.
A Squadron of RN Wessexs divert in due to fog in the English channel and their unexpected arrival is causing a fair bit of chaos.
A big gruff Lt. Cmdr jumps out of one of the rotors running choppers and bellows something into the ear of one of the airmen who has been sent out to the pan to help. Said airman gives the crewman the thumbs up over the din, jumps into his Landrover and heads back to the ASF. Ten minutes later the airman is back, drops the tailgate on the Landrover and sitting there is a large bucket of steaming hot water, a roll of blue tissue paper and a couple of large bars of soap. A number of the crewmen fall about laughing while the Lt. Cmdr starts to pound his bone dome with his fists.
It turns out he had asked the airman if the ASF had S.O.A.P. which means Spectrometric Oil Analysis Programme, for checking the condition of the engine.