176 LAWS GOVERNING MARINE INSPECTION 



by regulation, prescribe the form and content of such reports and 

 time of submitting them. This subsection shall not apply to any 

 ferry or any tug used in connection with a ferry operation, if such 

 ferry or tug is employed exclusively in trade on the Great Lakes, 

 lakes (other than the Great Lakes), bays, sounds, bayous, canals, 

 and harbors, and is not engaged on an international voyage. Any 

 master who shall violate any provision of this subsection or regula- 

 tions established hereunder shall be subject to a penalty of $500. 



Continuous discharge book and certificate of identification; ex- 

 tension of section 643(b) to other vessels and waters in na- 

 tional interest 



46 U.S.C. 643b 



The President is hereby authorized, whenever in his judgment 

 the national interest requires, to extend the provisions of subsection 

 (1) of section 643 of this title, to such additional clasps or classes of 

 vessels and to such waters as he may designate. 



Continuous discharge book and certificate of identification; ex- 

 ception as to unrigged vessels 



46 U.S.C. 643a 



Provisions of section 643 of this title shall not apply to unrigged 

 vessels except seagoing barges. 



Requirements, qualifications, and regulations as to crews 



46 U.S.C. 672(a) 



No vessel of one hundred tons gross and upward, except those 

 navigating rivers exclusively and the smaller inland lakes and 

 except as provided in section 569 of this title, shall be permitted 

 to depart from any port of the United States unless she has on 

 board a crew of not less than 75 per centum of which, in each de- 

 partment thereof, are able to understand any order given by the 

 officers of such vessel, nor unless 65 per centum of her deck crew, ex- 

 clusive of licensed officers and apprentices, are of a rating not less 

 than able seamen. Every person shall be rated an able seaman, and 

 qualified for ser\'ice as such on the seas, who is nineteen years of 

 age or upward, and has had at least three years' service on deck 

 at sea or on the Great Lakes, on a vessel or vessels to which this 

 section applies, including decked fishing vessels, and A'essels in 

 United States Government service; and every person shall be rated 

 an able seaman, and qualified to serve as such on the Great Lakes 

 and on the smaller lakes, bays, or sounds who is nineteen years of age 

 or upward and has had at least eighteen months' service on deck at 

 sea or on the Great Lakes or on the smaller lakes, bays, or sounds, on 

 a vessel or vessels to which this section applies, including decked 

 fishing vessels and vessels in the Ignited States Government service; 

 and graduates of school ships approved by and conducted under 

 rules prescribed by the Commandant of the Coast Guard may be 

 rated able seamen upon graduation in good standing from said 

 schools ships; Provided^ That no boy shall be shipped on any vessel 



