A 'spotter' is a person who guides an operator when the operator does not have full view of the intended path of travel, because a tall load is blocking their vision, and they must travel forwards.
A 'spotter' is an indivdual who has a clear view of your forklift, its load, and the truck's intended path of travel.
A 'spotter' must have been instructed in a code of signals for managing traffic in a workplace.

An escort...someone who you pay for a date, and other things? Sorry, its been a long tough day.

Hope the spotter helps you out.