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• 3 Horizontal Positioning and Spacing of Lights — International

  • (a) 

    When two masthead lights are prescribed for a power-driven vessel, the horizontal distance between them shall not be less than one-half of the length of the vessel but need not be more than 100 metres. The forward light shall be placed not more than one-quarter of the length of the vessel from the stem.

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    • (i) the horizontal distance between them shall be not less than one-quarter the length of the vessel but need not be more than 50 m, and

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