CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER I-A—MOBILE OFFSHORE DRILLING UNITS (parts 107 to 109) > PART 109—OPERATIONS > SUBPART E—Emergency Signals (§109.503 to §109.503) > 109.503—Emergency signals.

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]