Words similar to spotter

Example sentences for: spotter

How can you use “spotter” in a sentence? Here are some example sentences to help you improve your vocabulary:

At least one NYPD officer from this area managed to evacuate out toward 5 WTC, where he teamed up with a Port Authority police officer and acted as a spotter in advising the civilians who were still exiting when they could safely run from 1 WTC to 5 WTC and avoid being struck by people and debris falling from the upper floors.
This facility houses a custom made spotter built by Robotic Labware Designs (Carlsbad, CA).