Joe, you've been out of the loop for too long!! It's not the 108, it's the"107 book". Which means you are not immediately available to be ordered in. Such as a vacation or personal matter. You had to provide a location and a contact phone number. A lot of guys go out of state on their day leaves to try and avoid the order in. Doesn't always work.
Almost 13 years out of the loop! But at least I was close, one number off lol