Code of Federal Regulations Title 46. Shipping § 46.108.201 Size of sleeping spaces

(a) No sleeping space may berth more than four persons, except that a sleeping space for personnel not regularly employed on a unit may berth up to six persons if the space meets § 108.199 and berthing of six persons in that space is authorized by the Commandant (CG–OES).

(b) Without deducting any equipment used by the occupants, each sleeping space must have for each occupant—

(c) Each sleeping space must have at least 191 centimeters (approximately 6 feet 3 inches) of headroom over clear deck areas.