FOG SIGNALS.
In fog, mist, or falling snow, whether by day or night, a steamship under way shall blow a prolonged blast of her steam whistle every two minutes, or oftener. A sailing vessel under way shall blow her foghorn (which must be sounded by a bellows or other mechanical device and not by mouth power) at intervals of not less than two minutes, 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 not under way shall ring the bell at intervals of not less than two minutes.
STEERING AND SAILING RULES
FOR SAILING VESSELS.
A ship running free shall keep out of the way of a ship closehauled.
A ship closehauled on the port tack shall keep out of the way of a ship closehauled on the starboard tack.
When both are running free with the wind on different sides, the ship which has the wind on the port side shall keep out of the way of the other.
When both are running free with the wind on the same side, the ship which is to windward shall keep out of the way of the ship to leeward.
A ship which has the wind aft shall keep out of the way of the other ship.