A member of a military force charged with peacekeeping duties in a troublespot.
An officer of the peace (police officer) in a force run by a Canadian aboriginal community.
One that preserves the peace.
A guard, particularly on duty at the entrance to a military base.
A animal like a marmot tasked with alerting the pack to danger.
Sentry duty; time spent being a sentry.
A watchtower.
A form of drag to be towed underwater, which on striking bottom is upset and rises to the surface.