ORGANIC LAWS GOVERNING U.S. COAST GUARD 45 



cases where the red light of one vessel is opposed to the red light of 

 the other or where the green light of one vessel is opposed to the green 

 light of the other or where a red light without a green light or a green 

 light without a red light is seen ahead, or where both green and red 

 lights are seen anywhere but ahead. 



(b) For the purjxyses of this Rule and Rules 19 to 29 inclusive, ex- 

 cept Rule 20(c) and Rule 28, a seaplane on the water shall be deemed 

 to be a vessel, and the expression "power-driven vessel" shall be con- 

 strued accordingly. 



33 U.S.C. 1081 (Rule 19) 



AYlien two power-driven vessels are crossing, so as to involve risk of 

 collision, the vessel which has the other on her own starboard side shall 

 keep out of tlie way of the other. 



33 U.S.C. 1082 (Rule 20) 



(a) When a power-driven vessel and a sailing vessel are proceeding 

 in such directions as to involve risk of collision, except as provided for 

 in Rules 24 and 26, the power-driven vessel shall keep out of the way 

 of the sailing vessel. 



(b) This Rule shall not give to a sailing vessel the right to hamper 

 in a narrow channel, the safe passage of a power-driven vessel which 

 can navigate only inside such channel. 



(c) A seaplane on the water shall, in general, keep well clear of all 

 vessels and avoid impeding their navigation. In circumstances, how- 

 ever, where risk of collision exists, she shall comply with these Rules. 



33 U.S.C. 1083 (Rule 21) 



'N^liere by any of these Rules one of two vessels is to keep out of the 

 way, the otner shall keep her course and speed. Wlien, from any cause, 

 the latter vessel finds hei"self so close that collision cannot be avoided 

 by the action of the giving-way vessel alone, she also shall take such 

 action as will best aid to avert collision (see Rules 27 and 29). 



33 U.S.C. 1084 (Rule 22) 



Every vessel which is directed by these Rules to keep out of the way 

 of another vessel shall, so far as possible, take positive early action to 

 comply with this obligation, and shall, if the circumstances of the case 

 admit, avoid crossing ahead of the other. 



33 U.S.C. 1085 (Rule 23) 



Evei*y power-driven vessel which is directed by these Rules to keep 

 out of the way of another vessel shall, on approaching her, if necessary, 

 slacken her speed or stop or reverse. 



33 U.S.C. 1086 (Rule 24) 



(a) Notwithstanding anything contained in these Rules, every 

 vessel overtaking any other shall keep out of the way of the overtaken 

 vessel. 



(b) Every vessel coming up with another vessel from any direc- 

 tion more than 22i/^ degrees (2 points) abaft her beam, i.e., in such 

 a position, with reference to the vessel which she is overtaking, that 



