If you are in the navy, the night before a deployment is usually a pretty busy day and almost certainly it is that which is going to be your driving motivation. You are making sure that you have everything you need beforehand. Even though the ship's store has most of what you need, there are things far more convenient to get out in town.
Even if the time frame would make it technically possible, it becomes very implausible.
Curious, it is painful as hell but have you ever read Ballard's letter. I would link to it but afraid that it would run afoul with the moderators.