(a) A steam vessel under way shall sound, at intervals of not more than one minute, a prolonged blast.
Sail vessel under way.
(c) A sailing vessel under way shall sound, at intervals of not more than one minute, when on the starboard tack, one blast; when on the port tack, two blasts in succession, and when with the wind abaft the beam, three blasts in succession.
Vessels at anchor or not under way.
(d) A vessel when at anchor shall, at intervals of not more than one minute, ring the bell rapidly for about five seconds.
Vessels towing or towed.
(e) A steam vessel when towing, shall, instead of the signals prescribed in subdivision (a) of this article, at intervals of not more than one minute, sound three blasts in succession, namely, one prolonged blast followed by two short blasts. A vessel towed may give this signal and she shall not give any other.
Rafts, or other craft not provided for.
(f) All rafts or other water craft, not herein provided for, navigating by hand power, horse power, or by the current of the river, shall sound a blast of the fog horn, or equivalent signal, at intervals of not more than one minute.