173.057—Permitted locations for Class I watertight doors.
        
        (a) 
         Class I doors are permitted in any location on a sailing school vessel which has a mean length of 125 feet (38.1 meters) or less.
    
    
        
        (b) 
         Class I doors fitted in accordance with  § 170.270 of this subchapter shall additionally be marked in two-inch letters “RECLOSE AFTER USE”, and be provided with a remote position indicator at the main navigating station of the vessel.
    
    [CGD 83-005, 51 FR 924, Jan. 9, 1986]