Escape trunk
![Submarine escape trunk](/Images/godic/202501/11/Submarine_escape_trunk1508.gif")
![View inside a submarine escape trunk, looking up from below the lower hatch](/Images/godic/202501/11/Submarine_escape_trunk1508.jpg")
An escape trunk is a small compartment on a submarine which provides a means for crew to escape from a downed submarine; it operates on a principle similar to an airlock, in that it allows the transfer of persons or objects between two areas of different pressure.