13.505—Proof of service for “Tankerman-Engineer” endorsement.
        
        (a) 
         Service must be proved by a letter on company letterhead from the owner, operator, master, or chief engineer of a tankship or self-propelled tank vessel. The letter must specify—
    
    
        
        (1) 
         The classification of cargo (DL, LG, or both) carried while the applicant accumulated the service; and
    
    
        
        (2) 
         The number of days of officer, rating, and cadet service in the engine department on tankships or self-propelled tank vessels; or
    
    
        
        (b) 
         Service must be proved by certificates of discharge from tankships or self-propelled tank vessels with the appropriate classification of cargo (DL, LG, or both).
    
    [CGD 79-116, 60 FR 17142, Apr. 4, 1995, as amended by CGD 79-116, 62 FR 25135, May 8, 1997; USCG-2006-24371, 74 FR 11260, Mar. 16, 2009]