On a detachment to Keflavic back in the early eighties, the Flt Lt aircraft captain was introduced in the O Club Bar to a senior USAF Officer as "DETCOM SHACKLANT". Said USAF Officer called him Sir for the rest of the night...
Just love them spams. Reminds me of 42 farewell tour at NAS Brunswick circa '92. Well renowned senior AEO borrowed some Masters rank tabs and introduced himself to a mega-stressed B52 co-pilot as a rear-admiral. Dude was fetching and carrying drinks for him in the O club all night.