Ok maybe i should have quoted full rule 23! but since i thought the boat under 12 m...this does not count!
Rule 23 -power driven Vessels Under way
(a) A power driven vessel under way shall exhibit:
(i) a masthead light forward;
(ii) a second masthead light abaft of and higher than the forward one;
except that a vessel of less than 50 meters in length shall not be obliged to exhibit such a light but may do so;
(iii) sidelights: and
(iv) a stern light.
(b) An air-cushion vessel when operating in non-displacement mode shall, in addition to the lights prescribed in paragraph (a) of this Rule, exhibit an all-round flashing yellow light.
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