Letter

Extract from notice to mariners, February 19, 1875

[Inclosure.]

Extract from notice to mariners.

Every steamer, when under way, shall use a steam-whistle. Sailing-vessels, and all other craft propelled by sails, shall use a fog-horn.

Whenever there is a fog, whether by day or night, the fog-signals described below shall be sounded.

Sailing-vessels, and every craft propelled by sails, upon the ocean, lakes, and rivers, shall, when on their starboard tack, sound one blast of their fog-horn; when on their port tack, they shall sound two blasts of their fog-horn; when with the wind free or running large, they shall sound three blasts of their fog-horn; when lying to, or at anchor, they shall sound a general alarm. In each instance, the above signals shall be sounded at intervals of not more than two minutes.

Sailing-vessels, when not under weigh, and anchored or moored in the channel or fairway of commerce, shall sound the general-alarm signal at intervals of not more than two minutes; and all steamers navigating in a fog or thick weather, shall, by the rules governing pilots, sound their steam-whistle at intervals of not more than one minute.

Sources
FRUS u2014 Papers Relating to the Foreign Relations of the United States, Transmitted to Congress, With the Annual Message of the P View original source ↗
U.S. Department of State, Office of the Historian. Papers Relating to the Foreign Relations of the United States, Transmitted to Congress, With the Annual Message of the P.