We've got to open this double hatch and get one of these ships out.

This double hatch could be some kind of airlock.

They have a large oval shaped double hatch which opens forwards on top of the turret.

The commander/gunner has a cupola on the left side of the double hatch.

He waved everyone out, and the solid double hatches closed on the block of containment cells.

The fighting sounded closer, and the security quietly closed the double hatch.

We expelled the bodies through the double hatches and were alone in the U-29.

The normal access to the tank was by means of large double hatch at the back of the hull.

The ship had also a hidden double hatch in the stern to be used as an exit door for speedboats.

He rose and went over to a set of double hatches on the far bulkhead.