patrol

The act of moving about an area especially by an authorized and trained person or group, for purposes of observation, inspection, or security.

A person or group of persons who perform such an act.

A military unit sent out on a reconnaissance or combat mission.

One or more military vehicles, boats, ships, or aircraft assigned to guard or reconnoiter a given area.

A division of a Boy Scout troop or Girl Scout troop consisting of between six and eight children.