spotter

He would be driving a spotter car mounted with plate readers.

Ok was especially alarmed to see forklifts, which are responsible for a significant number of construction deaths, speeding around, often unaided by required spotters.

The judge added: "You had a leading role as a planner and a spotter and this was an act in revenge for previous incidents."

A few plane spotters gathered outside the airport to watch Air Force Two take off.

For years, rival gangs and their customers have hidden from the French police here - the gangs' spotters carefully guarding every possible entrance.