The lights prescribed in these Rules shall have an intensity as specified in Section 8 of Annex I to these Regulations so as to be visible at the following minimum ranges:a. In vessels of 50 metres or more in length: a masthead light, 6 miles;a sidelight, 3 miles;a sternlight, 3 miles;a towing light, 3 miles;a white, red, green or yellow all-round light, 3 miles. b. In vessels of 12 metres or more in length but less than 50 metres in length:a masthead light, 5 miles; except that where the length of the vessel is less than 20 metres, 3 miles;a sidelight, 2 … [Read more...]