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--

First. If steam vessels, shall carry in the same position as the white
light mentioned in article 2 (_a_) tricolored lantern so
constructed and fixed as to show a white light from right ahead to 2
points on each bow and a green light and a red light over an arc of the
horizon from 2 points on either bow to 2 points abaft the beam on the
starboard and port sides, respectively, and not less than 6 nor more
than 12 feet below the tricolored lantern a white light in a lantern so
constructed as to show a clear, uniform, and unbroken light all around
the horizon.

Second. If sailing vessels of 7 tons gross tonnage and upward, shall
carry a white light in a lantern so constructed as to show a clear,
uniform, and unbroken light all around the horizon, and shall also be
provided with a sufficient supply of red pyrotechnic lights, which shall
each burn for at least thirty seconds and shall be shown on the approach
of or to other vessels in sufficient time to prevent collision.

In the Mediterranean Sea the vessels referred to in subdivision
(_b_) 2 may use a flare-up light in lieu of a pyrotechnic light.

All lights mentioned in subdivision (_b_) 1 and 2 shall be visible
at a distance of at least 2 miles.

Third. If sailing vessels of less than 7 tons gross tonnage, shall not
be obliged to carry the white light mentioned in subdivision (_b_)
2 of this article, but if they do not carry such light they shall have
at hand, ready for use, a lantern showing a bright white light, which
shall on the approach of or to other vessels be exhibited where it can
best be seen in suffici