Spacecraft components (1) Hull: The term hull refers to the body or frame of a ship or starship. Warp-worthy vessels must have a hull able to withstand extreme accelerations. The hull of a Starfleet vessel is usually separated into two parts: the primary and secondary hulls. Hull plating is an external armor component of a starship's or shuttle's hull. Hull resiliency is a measurement of how well a hull can withstand damage. The primary and secondary hulls of Constitution-class, Galaxy-class, an