First you need the letter authorization from the active duty member's command.....that needs to be taken to the airport where you are trying to leave from and then request to be put on their Space A list.....there will be people who have already done that and are on the list from several months ago, they can "bump" you if they are in the same travel category as you are.....the "call" list is based on the date that you filed your authorization for each of the levels, so do it ASAP....then literally you find out what time you must be there for your "roll call" and then you wait to see if there are seats available....active duty travelling are priority, then active duty with dependents, then dependents alone, and then retirees....there are approx 5 levels that a Space A person can fall under....Heads up....I have spent days waiting for a seat and have spent numerous days and nights travelling back and forth to Capo.....only to be the next one on the flight and no more seats available.....I ended going last time to Ramstein and then on to Dover in the states on a C-5.....good luck...I will watch for any other questions that you may have....