This is what you can expect. "Long call" is the starting and ending point. But in-between you'll be on short call. "In-between" starts either the day prior or first day, when they tell you you're on short call the next day or later that day and ends when you're released at the end. "In-between" it will be all short calls or FSBs at your base. In other words, there is a good chance you will be at your base from day one until last day of your reserve period. YMMV