Section 88(a) in The Andaman and Nicobar Islands Port Rules, 2004
(a)if in tow alongside at night exhibit in a properly constructed lantern on the outer edge of the vessel and at a height of not less than 91 cms, above any constructions on deck, a white light, clear, uniform and unbroken, which shall be visible all around the horizon at a distance of atleast 2 nautical miles.
