138 LAWS GOVERNING MARINE INSPECTION 



That no such vessel shall be navigated unless she shall have on 

 board and in her service one duly licensed master. 



Every sucli vessel of one thousand gross tons and over, propelled 

 by machinery, shall have in lier service and on board three licensed 

 mates, who shall stand in three watches while such vessel is being 

 navigated, unless such vessel is engaged in a run of less than four 

 hundred miles from the port of departure to the port of final desti- 

 nation, then such vessel shall have two licensed mates; and every 

 vessel of two himdred gross tons and less than one thousand gross 

 tons, propelled by machinery, shall have two licensed mates. 



Every such vessel of one hmidred gross tons and under two hun- 

 dred gross tons, propelled by machinery, shall have on board and 

 in her service one licensed mate; but if such vessel is engaged in a 

 trade in which the time required to make the passage from the port 

 of departure to the port of destination exceeds twenty-four hours, 

 then such vessel shall have two licensed mates. 



Nothing in this section shall be so construed as to prevent the 

 Coast Guard from increasing the number of licensed officers on any 

 vessel subject to the inspection laws of the United States, if, in its 

 judgment, such vessel is not sufficiently manned for her safe navi- 

 gation: Provided^ That this section shall not fipply to fishing or 

 whaling vessels, yachts, or motorboats as defined in the act of June 9, 

 1910, ch. 268, 36 Stat. 462 or to wrecking vessels. 



Membership of officer in United States Naval Reserve 



46 U.S.C. 1132(g) 



All of the deck and engineer officers employed on vessels on which 

 an operating-differential subsidy is paid under authority of sub- 

 chapter VI of this chapter, or employed on the vessels of the Depart- 

 ment of Commerce after one year after June 29, 1936 shall, if eligible, 

 be members of the United States Naval Reserve. 



Watch duty of deck officers 



46 U.S.C. 235 



It shall be unlawful for the master, owner, agent, or other person 

 having authority, to pennit an officer of any vessel to take charge 

 of the deck watch of the vessel upon leaving or immediately after 

 leaving port, unless such officer shall have had at least six hours 

 off duty within the twelve hours immediately preceding the time of sail- 

 ing, and no licensed officer on any ocean or coastwise vessel shall be 

 required to do duty to exceed nine hours of any twenty-four while in 

 port, including the date of arrival, or more than twelve hours of any 

 twenty-four at sea, except in a case of emergency when life or property 

 is endangered. Any violation of this section shall subject the person 

 or persons guilty thereof to a penalty of $100. 



Requirements, qualifications, and regulations as to crews 



46 U.S.C. 672(a) 



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

 gating rivers exclusively and the smaller inland lakes and except as 



