To use the gramaphone to locate a ship, you need to get Bernard standing up on deck with the ships record collection. He then frisbees the records out into the sea. You have to listen for the sound of of your favourite LP hitting the side of a ship. The angle Bernard was facing is the ships bearing and the length of time between Bernard flinging the LP into the briney and the clunk of LP against steel gives you an idea of the ships range.
BTW to be really effective, you need a considerable collection of records.
Something suitable is available here:
http://www.subsim.com/radioroom/showthread.php?t=128841