(1)"Mast head light" 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 degree and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel. This light shall be placed as far as practicable at height above the hull of not less than 3 meters for vessels of 20 meters or more in length and 2 meters for vessels of less than 20 meters in length.(2)"Sidelights" a green light on the starboard side and a red light on the port side each showing an unbroken light over an arc of the horizon of 112.5 degrees and so fixed as to show the light from right ahead to 22 degrees abaft the bean on its respective side. In a vessel of less than 20 meters in length the sidelights may be combined in one lantern carried the fore and aft centerline of the vessel. Side lights shall be placed not less than 1 meter below the mast head light.(3)"Stern light" a white light placed as nearly as practicable at the stern showing an unbroken light over an arc of the horizon of 135 degree arid so fixed as to show the light 67.5 degrees from light aft on each side of the vessel.(4)"Towing light" an yellow light having the same characters as "Stern light' mentioned in sub section (3) of this rule.(5)"All-round light" a light showing an unbroken light over an arc of the horizon of 360 degrees.(6)"Flashing light" a light flashing at regular intervals.
