Prime Team

A Prime Team was an elite group of 5—10 personnel trained for a variety of roles. They had the full capabilities of a crew unit, of a boarding party, of a commando squad, of a heavy weapons squad, of a hostage rescue team, of a scientific research unit, and of a diplomatic negotiation team. Battleships, dreadnoughts, command cruisers, battle cruisers, galactic survey cruisers, as well as diplomatic transports usually had Prime Teams onboard as part of their normal crew, with heavy cruisers having those on occasion only. (Star Fleet Battles)