oars or sails of less than 20, tons gross tonnage respectively, and rowing boats, when under way, shall not be obliged to carry the lights mentioned in Article 2 (a), (b), and (c), but if they do not carry them they shall be provided with the following lights:—
1. Steam vessels of less than 40 tons shall carry:—
(a) In the fore part of the vessel, or on or in front of
the funnel, where it can best be seen, and at
a height above the gunwale of not less than
nine feet, a bright white light constructed and
fixed as prescribed in Article 2 (a), and of such
a character as to be visible at a distance of at
least two miles.
(b) Green and red side-lights constructed and fixed
as prescribed in Article 2 (b) and (c), and of
such a character as to be visible at a distance
of at least one mile, or a combined lantern
showing a green light and a red light from right
ahead to two points abaft the beam on their
respective sides. Such lantern shall be carried
not less than three feet below the white light.
2. Small steamboats, such as are carried by sea-going vessels, may carry the white light at a less height than nine feet above the gunwale, but it shall be carried above the combined lantern mentioned in subdivision 1 (b).
3. Vessels under oars or sails, of less than 20 tons, shall have ready at hand a lantern with a green glass on one side and a red glass on the other, which, on the approach of or to other vessels, shall be exhibited in sufficient time to prevent collision, so that the green light shall not be seen on the port side nor the red light on the starboard side.
4. Rowing boats, whether under oars or sails, shall have ready at hand a lantern, showing a white light, which shall be temporarily exhibited in sufficient time to prevent collision.
