Navigation Rules and Regulations Handbook by US Coast Guard

Author:US Coast Guard
Language: eng
Format: epub
Publisher: Skyhorse
Published: 2018-03-04T16:00:00+00:00

—INTERNATIONAL—

Annex I—CONTINUED

9. Horizontal sectors

(a) (i) In the forward direction, sidelights as fitted on the vessel shall show the minimum required intensities. The intensities shall decrease to reach practical cut-off between 1° and 3° outside the prescribed sectors.

(ii) For sternlights and masthead lights and at 22.5° abaft the beam for sidelights, the minimum required intensities shall be maintained over the arc of the horizon up to 5° within the limits of the sectors prescribed in Rule 21. From 5° within the prescribed sectors the intensity may decrease by 50% up to the prescribed limits; it shall decrease steadily to reach practical cut-off at not more than 5° outside the prescribed sectors.

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