(a) A power-driven vessel underway shall exhibit:
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(i) a masthead light forward;
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(ii) a second masthead light abaft of and higher
than the forward one; except that a vessel of less than 50 metres
in length shall not be obliged to exhibit such light but may do so;
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(iii) sidelights;
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(iv) a sternlight.
(b) An air-cushion vessel when operating in the
non-displacement mode shall, in addition to the lights prescribed
in paragraph (a) of this Rule, exhibit an all-round flashing yellow
light.
(c) A WIG craft only when taking off, landing
and in flight near the surface shall, in addition to the lights prescribed
in paragraph (a) of this Rule, exhibit a high intensity all-round
flashing red light.
(d)
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(i) A power-driven vessel of less than 12 metres
in length may in lieu of the lights prescribed in paragraph (a) of
this Rule exhibit an all-round white light and sidelights;
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(ii) a power-driven vessel of less than 7 metres
in length whose maximum speed does not exceed 7 knots may in lieu
of the lights prescribed in paragraph (a) of this Rule exhibit an
all-round white light and shall, if practicable, also exhibit sidelights;
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(iii) the masthead light or all-round white light
on a power-driven vessel of less than 12 metres in length may be displaced
from the fore and aft centreline of the vessel if centreline fitting
is not practicable, provided that the sidelights are combined in one
lantern which shall be carried on the fore and aft centreline of the
vessel or located as nearly as practicable in the same fore and aft
line as the masthead light or the all-round white light.