Section 87(b) in The Andaman and Nicobar Islands Port Rules, 2004
(b)Port harbour craft engaged in towing of dumb barges shall, if in the alongside exhibit in a property constructed lantern on the knowledge of the vessel and at a height of not less than 91 cms, above any construction on deck, a white light, clear uniform and unbroken which shall be visible all around the horizon at a distance of atleast 2 NM, if in tow astern, exhibit a similar white light at the last end at a height of not less than 1.83 meter above the deck.
