"We've got one more cannon to take out, then you can get to the main airlock."

I rather think your services will shortly be needed in the main airlock.

The space just over the main airlock was distorted, disturbed.

The chief steward asked everyone to make their way down to the main airlock, where they would suit up and walk over to the station.

It was a short walk over the sandy lava to the main airlock.

He was led down to the main airlock and out onto the surface of Deimos.

The main airlock was on the port side of the cabin.

At noon, a brief service was held near the main airlock.

But not near the bottom of the main airlock's ramp; that area was clear.

Please go to your transport bay and let my people in through the main airlock.