ORGANIC LAWS GOVERNING U.S. COAST GUARD 43 



(iv) A vessel when at anchor shall at intervals of not more 

 than 1 minute ring the bell rapidly for about 5 seconds. In ves- 

 sels of more than o5(1 feet in length the bell shall be sounded in 

 the forepart of the vessel, and in addition there shall be sounded 

 in the after part of the vessel, at intervals of not more than 1 

 minute for about 5 seconds, a gong or other instrument, the tone 

 and sounding of which cannot be confused with that of the bell. 

 Every vessel at anchor may in addition, in accordance with Rule 

 1*2, sound three blasts in succession, namely, one short, one pro- 

 longed, and one short blast, to give warning of her position and of 

 the possibility of collision to an approaching vessel. 



(v) A vessel when towing, a vessel engaged in laying or in 

 picking up a submarine cable or navigation mark, and a vessel 

 under way which is unable to get out of the way of an approach- 

 ing vessel through being not under command or imable to 

 manoeuvre as required by these Rules shall, instead of the signals 

 prescribed in subsections (i), (ii), and (iii) sound, at intervals of 

 not more than 1 minute, three blasts in succession, namely, one 

 prolonged blast followed by two short blasts. 



(vi) A vessel towed, or, if more than one vessel is towed, only 

 the last vessel of the tow, if manned, shall, at intervals of not more 

 than 1 minute, sound four blasts in succession, namely, one pro- 

 longed blast followed by three short blasts. When practicable, 

 this signal shall be made immediately after the signal made by the 

 ' towing vessel. 



(vii) A vessel aground shall give the bell signal and, if re- 

 quired, the gong signal, prescribed in sub-section (iv) and shall, 

 in addition, give 3 separate and distinct strokes on the bell imme- 

 diately before and after such rapid ringing of the bell. 



(viii) A vessel engaged in fishing when under way or at anchor 

 shall at intervals of not more than 1 minute sound the signal pre- 

 scribed in sub-section (v). A vessel when fishing with trolling 

 lines and under way sliall sound the signals prescribed in sub- 

 sections (i), (ii) or (iii) as may be appropriate. 



(ix) A vessel of less than 40 feet in length, a rowing boat, or a 

 seaplane on the water, shall not be obliged to give the above-men- 

 tioned signals but if she does not, she shall make some other effi- 

 cient sound signal at intervals of not more than 1 minute. 



(x) A power-driven pilot -vessel when engaged on pilotage 

 duty may, in addition to the signals prescribed in sub-sections 

 (i), (ii), and (iv), sound an identity signal consisting of 4 short 

 blasts. 



33 U.S.C. 1077 (Rule 16) 



(a) Every vessel, or seaplane when taxiing on the water, shall, in 

 fog, mist, falling snow, heavy rainstorms or any other condition simi- 

 larly restricting visibility, go at a moderate speed, having careful 

 regard to the existing circumstances and conditions. 



(b) A power-driven vessel hearing, apparently forward of her 

 beam, the fog-signal of a vessel the position of which is not ascertained, 

 shall, so far as the circumstances of the case admit, stop her engines, 

 and then navigate with caution until danger of collision is over. 



