Merchant Shipping (Prevention of Collisions at Sea) Regulations, 2007.

These rules shall apply to all vessels upon the high seas and in all waters connected therewith navigable by seagoing vessels. They establish several provisions related to operation of special rules made by the Director for roadsteads, harbours, rivers, lakes or inland waterways connected with the high seas and navigable by seagoing vessels. Such special rules shall conform as closely as possible to these rules. Nothing in these rules shall interfere with the operation of any special rules made by the Government of any State with respect to additional station or signal lights, shapes or whistle signals for ships of war and vessels proceeding under convoy, or with respect to additional station or signal lights or shapes for fishing vessels engaged in fishing as a fleet. These additional station or signal lights, shapes or whistle signals shall, so far as possible, be such that they cannot be mistaken for any light, shape or signal authorised elsewhere under these rules.