How many billets with NEC 9516 are required on ships operating a brig?

The correct answer indicates that one billet with NEC 9516 is required on ships operating a brig. NEC 9516 specifically pertains to the personnel who are qualified to oversee the operations and management of a brig, which is essential for maintaining order and security aboard a vessel.

The requirement for one billet ensures that there is a designated individual trained in the relevant procedures, laws, and regulations applicable to the management of detainees or those held in confinement onboard. This role is crucial for maintaining discipline and security within the ship's environment, particularly when handling personnel issues or incidents that necessitate confinement.

Having just one qualified person allows for accountability and proper oversight while ensuring that standards are met. Additional billets may be necessary for larger operations or a more robust security procedure, but for standard operations, having one qualified individual is sufficient to meet the needs of the brig's function aboard the ship.