Second. Small steamboats, such as are carried by seagoing vessels, may carry the white light at a less height than 9 feet above the gunwale, but it shall be carried above the combined lantern mentioned in subdivision 1 (b).
Third. Vessels under oars or sails of leas 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.
The vessels referred to in this article shall not be obliged to carry the lights prescribed by article 4 (a) and article 11 last paragraph.
ART. 8. Pilot vessels when engaged on their station on pilotage duty shall not show the lights required for other vessels, but shall carry a white light at the masthead, visible all around the horizon, and shall also exhibit a flare-up light or flare-up lights at short intervals, which shall never exceed fifteen minutes.
On the near approach of or to other vessels they shall have their side lights lighted ready for use and shall flash or show them at short intervals to indicate the direction in which they are heading; but the green light shall not be shown on the port side nor the red light on the starboard side.
A pilot vessel of such a class as to be obliged to go alongside of a vessel to put a pilot on board may show the white light instead of carrying it at the masthead, and may instead of the colored lights above mentioned have at hand ready for use a lantern with a green glass on the one side and a red glass on the other, to be used as prescribed above.
Pilot vessels when not engaged on their station on pilotage duty shall carry lights similar to those of other vessels of their tonnage.
ART. 9. Fishing vessels and fishing boats when under way and when not required by this article to carry or show the lights therein named shall carry or show the lights prescribed for vessels of their tonnage under way.
(a) Vessels and boats when fishing with drift nets shall exhibit two white lights from any part of the vessel where they can best be seen. Such lights shall be placed so that the vertical distance between them shall be not less than 6 feet and not more than 10 feet, and so that the horizontal distance between them measured in a line with the keel shall be not less than 5 feet and not more than 10 feet. The lower of these two lights shall be the more forward, and both of them shall be of such a character as to show all around the horizon and to be visible at a distance of not less than 3 miles.
(b) Vessels when engaged in trawling, by which is meant the dragging of an apparatus along the bottom of the sea—