porthole

He’s even built a concrete fire shelter against a hillside with two steel escape doors and porthole windows.

“What a beautiful view,” Shepherd told the command center as he looked out the tiny porthole of his capsule, flying high enough to see the Earth’s curve.

It also had two watertight hatches for entering and leaving the vessel, one at the front and another at the rear, and two short conning towers equipped with small portholes.

The cramped cabin had three small portholes, radio equipment, and instrument panels.

An officer inside emerged from a porthole at the top of the vehicle and trained a rifle on the passengers inside the big rig.