e. A steam-vessel when under way may carry an additional white
light similar in construction to the light mentioned in sub-
division a. These two lights shall be so placed in line with
the keel that one shall be at least 15 ft. 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 sidelights, carry two bright white lights in a vertical
line one over the other, not less than 6 ft. apart, and when towing
more than one vessel shall carry an additional bright white light 6 ft.
above or below such lights if the length of the tow, measuring from
the stern of the towing-vessel to the stern of the last vessel towed,
exceeds 600 ft. Each of these lights shall be of the same con-
struction and character, and shall be carried in the same position,
as the white light mentioned in Article 2 a, except the additional
light, which may be carried at a height of not less than 14 ft. above
the hull.

Such steam-vessel may carry a small white light abaft the funnel
or aftermast for the vessel towed to steer by, but such light shall
not be visible forward of the beam.

Art. 4.—a. A vessel which from any accident is not under
command shall carry at the same height as the white light mentioned
in Article 2 a, where they can best be seen, and, if a steam-vessel,
in lieu of that light, two red lights in a vertical line one over the other,
not less than 6 ft. apart, and of such a character as to be visible all
round the horizon at a distance of at least 2 miles; and shall by
day carry in a vertical line one over the other, not less than 6 ft.
apart, where they can best be seen, two black balls or shapes, each
2 ft. in diameter.

b. A vessel employed in laying or in picking up a telegraph-cable
shall carry in the same position as the white light mentioned in
Article 2 a, and, if a steam-vessel, in lieu of that light, three lights
in a vertical line one over the other, not less than 6 ft. apart. The
highest and lowest of these lights shall be red, and the middle light
shall be white, and they shall be of such a character as to be visible
all round the horizon at a distance of at least 2 miles. By day she
shall carry in a vertical line one over the other, not less than 6 ft.
apart, where they can best be seen, three shapes not less than 2 ft.
in diameter, of which the highest and lowest shall be globular in
shape and red in colour, and the middle one diamond in shape and
white.

c. The vessels referred to in this article, when not making way
through the water, shall not carry the sidelights, but when making
way shall carry them.

d. The lights and shapes required to be shown by this article
are to be taken by other vessels as signals that the vessel showing
them is not under command, and cannot therefore get out of the way.

These signals are not signals of vessels in distress and requiring
assistance. Such signals are contained in Article 31.

Art. 5.—A sailing-vessel under way, and any vessel being towed,
shall carry the same lights as are prescribed by Article 2 for a steam-
vessel under way, with the exception of the white lights mentioned
therein, which they shall never carry.

Art. 6.—Whenever, as in the case of small vessels under way
during bad weather, the green and red sidelights cannot be fixed,
these lights shall be kept at hand lighted and ready for use; and shall,
on the approach of or to other vessels, be exhibited on their respective
sides in sufficient time to prevent collision, in such manner as to
make them most visible, and so that the green light shall not be seen
on the port side nor the red light on the starboard side, nor, if
practicable, more than two points abaft the beam on their respective
sides.

To make the use of these portable lights more certain and easy,
the lanterns containing them shall each be painted outside with the
colour of the light they respectively contain, and shall be provided
with proper screens.

Art. 7.—Steam-vessels of less than 40, and vessels under 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 men-
tioned in Article 2 a, b, and c, but if they do not carry them they shall
be provided with the following lights:—