at a greater height above
the hull than 40 feet a bright white light so constructed as to show
an unbroken light over an arc of the horizon of 20 points of the
compass, so fixed as to throw the light 10 points on each side of the
vessel--namely, from right ahead to 2 points abaft the beam on either
side--and of such a character as to be visible at a distance of at least
5 miles.

(_b_) On the starboard side a green light so constructed as to show
an unbroken light over an arc of the horizon of 10 points of the
compass, so fixed as to throw the light from right ahead to 2 points
abaft the beam on the starboard side, and of such a character as to be
visible at a distance of at least 2 miles.

(_c_) On the port side a red light so constructed as to show an
unbroken light over an arc of the horizon of 10 points of the compass,
so fixed as to throw the light from right ahead to 2 points abaft the
beam on the port side, and of such a character as to be visible at a
distance of at least 2 miles.

(_d_) The said green and red side lights shall be fitted with
inboard screens projecting at least 3 feet forward from the light, so as
to prevent these lights from being seen across the bow.

(_e_) A steam vessel when under way may carry an additional white
light similar in construction to the light mentioned in subdivision
(_a_). These two lights shall be so placed in line with the keel
that one shall be at least 15 feet higher than the other and in such a
position with reference to each other that the lower light shall be
forward of the upper one. The vertical distance between these lights
shall be less than the horizontal distance.

ART. 3. A steam vessel when towing another vessel shall, in addition to
her side lights, carry two bright white lights in a vertical line one
over the other, not less than 6 feet apart, and when towing more than
one vessel shall carry an additional bright white light 6 feet above or
below such light if the length of the tow measuring from the stern of
the towing vessel to the stern of the last vessel towed exceeds 600
feet. Bach of these lights shall be of the same construction and
character and shall be carried in the same position as the white light
mentioned in article 2 (_a_), excepting the additional light, which
may be carried at a height of not less than 14 feet above the hull.

Such steam vessel may carry a small whi