1.   And they said equipment, such as surveillance cameras and silent alarms switches, should be stationed in the lobby and shipping areas.

2.   Airport spokesman Peter Gibb said an alarm switch apparently was accidentally bumped during the flight.

3.   Besides Hall, one other guest was seated at the helm of the submarine and another was positioned at an alarm switch when the accident happened.

4.   Besides Hall, one other guest was seated at the helm and another was positioned at an alarm switch when the accident happened.