spotter

IPA: spˈɑtɝ

A person who observes something.
A member of a sniper team who in addition to this function is responsible for providing additional information about targets from a different point of view.
(weightlifting, gymnastics, climbing) One who supervises a person performing an activity, in order to help them should they be unable to complete it.
(US) A person who gives directions for a crane or vehicle (that is challenging to navigate) from a different point of view to the moved load.
Dolphins of the genus Stenella, and specifically Stenella attenuata distinguished from the streaker (Stenella coeruleoalba) and the spinner (Stenella longirostris).
(motor racing) A team member responsible for communication with the driver to keep them up-to-date about on-track events, such as other nearby cars.

Examples of "spotter" in Sentences

Not to mention that your spotter could be your best friend.
* In the first scene, Gunny Swagger and his spotter are about to shoot at bad guys and the spotter is calling off distances in yards.
So it may have just been where they think units are moving or they have indications from what they call a spotter, someone informing them.
Crew chief Steve Letarte said after listening to tapes of Dickerson, he believed the spotter could be the key to helping Gordon close out races.
If you are pressed for time, do not choose free weights, because it takes longer to train with them—changing weights, changing bars—and you need another person commonly referred to as a spotter.
"The spotter is the third musketeer on the radio, and when he became available, I listened to a lot of tapes, I did a lot of research, and although the timing was short, I recognized his style will help us build upon our continued communication improvements."