английский => русский Искусство/Литература Кино, кинематография, телевидение, театр Job title

This detailed anatomy of moviemaking explained that the gaffer is chief electrician or lighting technician on a production set and that the best boy is the gaffer's first mate. Both work for the director of photography, setting up lights and equipment, orchestrating the shoot. Grips are crewmembers who move the equipment and assemble it on the set or on location. The chief of this crew is known as the key grip. As you might expect, the bigger the production the more exotic credits like dolly grip, wrangler, greensman and Foley artist.

Best Boy
AKA: Assistant Chief Lighting Technician, Best Boy Grip, Best Boy Electric
The chief assistant, usually of the gaffer, but more often lately used as a general term for the second in command of a group. This term is likely borrowed from early sailing and whaling crews, as sailors were often employed to set up and work rigging in theatres. There are no "best girls" per se; female chief assistants are also called "Best Boys".