When I nodded, he swung open the outer lock door.

When the lock door swung open I knew why the preparations.

He turned abruptly away from the port light toward the inner lock door.

The outside lock door still lay extended downward as a ramp.

They saw the inner lock door It seemed that men should be there to welcome them.

Unfortunately the outer lock door could not be included in the check, and it was stuck.

It was a smaller hole than the one in the outside lock door.

The red light turned green and the ship's lock door opened.

They went in after it and the lock doors closed.

The inner lock door opened to reveal a knot of men.