Originally Posted by Han Solo

Authorized Personal Drop

If the company has 20% (??) of the required reserve manning you can use your APD to drop 1 trip per year, except for certain designated holidays. It's use or lose and resets on your date of hire. A PD, or personal drop works the same way except you have no limit on their use but reserve manning must be 100% or greater. My 20% number might be a little off but close enough to get the gist of what an APD is.