Section 109.503 - Emergency signals(a) Emergency stations signals are established as follows:(1) The signal to man emergency stations is a rapid succession of short soundings of both the general alarm bell and the whistle, if a whistle is installed, for a period of not less than 10 seconds.(2) The signal to secure from emergency stations is the sounding of both the general alarm bell and the whistle, if a whistle is installed, three times.(b) The abandon unit stations signals are established as follows:(1) The signal to man abandon unit stations is a continuous sounding of both the general alarm and the whistle, if a whistle is installed.(2) If whistle signals are used to direct the handling of lifeboats and davit-launched liferafts, they must be- (i) One short blast to lower the lifeboats and davit-launched liferafts; and(ii) Two short blasts to stop lowering the lifeboats and davit-launched liferafts.(3) The signal to secure from abandon unit stations is the sounding of both the general alarm bell and the whistle, if a whistle is installed, three times.CGD 73-251, 43 FR 56828, Dec. 4, 1978, as amended by CGD 84-069, 61 FR 25303, May 20, 1996