Applying the Rule(s) and comments:
In accordance with Rule 21
(b) (Definitions), "sidelights
" means a green light on the starboard side and a red light on the port side each showing an unbroken light over an arc of the horizon of 112.5° and so fixed as to show the light from right ahead to 22.5° abaft the beam on its respective side. In accordance with Rule 21
(b) (Definitions), in a vessel of less than 20 m in length the sidelights
may be combined in one lantern carried on the fore-and-aft centreline of the vessel.
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