22.23 Power-driven vessels underway

(1) Subject to 22.23(3), a power-driven vessel underway must exhibit—

(a) a masthead light forward; and

(b) a second masthead light abaft of and higher than the forward one,

EXCEPT that a vessel of less than 50 metres in length is not obliged to exhibit such light but may do so; and

(c) sidelights; and

(d) a sternlight.

(2) In addition to the lights prescribed in rule 22.23(1), an all-round flashing yellow light must be exhibited by—

(a) air cushion vessels operating in the non-displacement mode; and

(b) high speed vessels whilst operating within enclosed water limits at or above a speed of 25 knots.

(3) Instead of exhibiting the lights prescribed in subrule (1), a power-driven vessel—

(a) of less than 12 metres in length may exhibit an all-round white light and sidelights; and

(b) of less than 7 metres in length, whose maximum speed does not exceed 7 knots, may exhibit an all-round light and must, if practicable, exhibit sidelights.

(4) In addition to the lights prescribed in rule 22.23(1), a WIG craft must and may only exhibit a high-intensity all-round flashing red light when—

(a) taking off;

(b) landing; or

(c) in flight near the surface of the water.