Military Crews
Not having a good memory for names I always had difficulty with a military crew of more than about 5 as they were rarely the same people for long.
Consequently one had to resort to Captain, Co-pilot, Eng, Nav, Loadie 1, Loadie 2, AEO, Nose gunner, Mid upper, Wiso, Boomer etc. And what names are given to all of those system operators on a P3, a Nimrod or an Awacs ? Can't imagine the crew carrying around a directory.
Personal names will always be snafu for CRM especially in a stressful situation.
How does the RAF/RAAF/USAF currently solve this problem particularly when your Captains may not be the First Pilot ?