The lights prescribed in these Rules shall have an intensity as specified in Section 8 Annex I to these Regulation so as to be visible at the following minimum ranges:
(a) In vessels of 50 metres or more in length:
– a masthead lightMasthead light' means a white light placed over the fore and aft centerline of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel. More, 6 miles;
– a sidelight, 3 miles;
– a sternlight'Sternlight' means a white light placed as nearly as practicable at the stern showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel. More, 3 miles;
– a towing light'Towing light' means a yellow light having the same characteristics as the 'sternlight' defined in paragraph(c) of this Rule. More, 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 m in length:
– a masthead light, 5 miles; except that where the length of the vesselThe word 'vessel includes every description of water craft, including non-displacement craft, WIG craft and seaplanes, used or capable of being used as a means of transportation on water'. is less than 20 meters, 3 miles;
– a sidelight, 2 miles;
– a sternlight, 2 miles;
– a towing light, 2 miles;
– a white, red, green or yellow all-round light, 2 miles.
(c) In vessels of less than 12 metres in length:
– a masthead light, 2 miles,
– a sidelight, 1 mile,
– a sternlight, 2 miles,
– a towing light, 2 miles;
– a white, red, green or yellow all-round light, 2 miles.
(d) In inconspicuous, partly submerged vessels or objects being towed; a white all-round light, 3 miles.