spotter
n//ˈspɑ.tɚ//spanare, spotter, utkik, förman, Stenella-delfin
(weightlifting, gymnastics, climbing) One who supervises a person performing an activity, in order to help them should they be unable to complete it.
(broadcasting) A person employed to assist a sports presenter by identifying the players or events during a game.
(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).