He turned and headed for the sick bay door, moving slowly at first.

Finally, the light turned to green, and immediately the bay doors began to open.

They'd left someone on guard at the loading bay door.

Finally, the sound of the air moving disappeared and the bay doors were open.

He looked around and found the switch near the bay door.

He could already see the craft through the open bay doors.

They had to get the outer bay doors open for them.

Frank asked in a low tone, "Have you opened the bay door yet?"

He went to the barn's bay door, which they'd left open, and looked out.

There could be no slight opening of the bay door.