Back in 1970 there was a thee-crew Shack detachment (airborne SAR cover for Prince Charles) to the Caribbean and Mexico from Puckoon International Field. Our accountants burned the midnight oil and all thay could come up with was HOTAC with all meals on the imprest and about a quid a day in LOA. Then, the day before departure, the support Herc arrived. I took the co-pilot for a coffee and he was bragging about the allowances. HOTAC accommodation + two thirds of a rate one. Huge dosh.
I asked him for the reference, which he gladly gave me. As Maritime was newly part of Strike Command, the rules seemed to apply to us. I drafted a Signal Message, the Boss signed it and three hours later we got approval. Thanks Herc mates, we were all in the same Air Force after all! We did enjoy Bermuda, Nassau and Acapulco.