What goes around comes around:
Similar circumstances in a way (recent battalion changeover in S Armagh, all resupplies flown in by heli) - call goes to ground station "Two Zero this is Whiskey 63 Lima, your location 2 minutes, over". After a pause while the XMG op scrabbled for his BATCO: "Unknown callsign, authenticate Golf Bravo". Immediate reply was: "I authenticate - do you want your rations or not?". Dates back to mid-70s - perhaps one of the Albert crew had been on SH in a previous life.