When the crew is rescued from a ship I can imagine they see the ship as lost and it is probably going to sink. Because that's why they rescued the crew in the f

When the crew is rescued from a ship I can imagine they see the ship as lost and it is probably going to sink. Because that's why they rescued the crew in the first place. So GPS won't help much. But I can imagine an other kind of beacon could be useful to recover things from the sunken ship.