Definition
Region A covers Europe, Africa, Australasia, most of Asia and the Gulf states. Entering a harbour or proceeding in the conventional direction of buoyage, port-hand marks are red with can (cylindrical) shape and any red can topmark; starboard-hand marks are green with conical shape and a green cone topmark, point upward. Lights, where fitted, match the body colour: red to port, green to starboard. Preferred channel marks use the opposite colour as a horizontal band.
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