Remember that they were "hot bunking" it, meaning one man gets out of a bunk to go on watch and the other man climbs into it while it is still warm. (Bit of an exaggeration, which sailors never, ever do.) So 1/2 the crew was in bed or washing their nasty butts while the other half was at a station ready to handle problems and making sure everything was running properly. This was typically run in a "meal to meal" basis. You got up, ate breakfast, stood watch until noon, then bunked out. THIS IS IF the Chief of the Boat didn't want something done that required more hands.
Those going on watch ate first, those off watch ate second, and those coming off watch ate last. Typically, you had about 10-15 minutes to finish your meal.