OAR 250-011-0090: Visibility of Lights

(1) Vessel lights as prescribed herein shall have visible intensity. (2) In a vessel of 50 meters or more in length: (a) A masthead light, six miles; (b) A sidelight, three miles; (c) A sternlight, three miles; (d) A towing light, three miles; (e) A white, red, green or yellow all-round light, three miles; and a special flashing light, two miles. (3) In a vessel of 12 meters or more in length but less that 50 meters in length: (a) A masthead light, five miles; except that where the length of the vessel is less than 20 meters, three miles; (b) A sidelight, two miles; (c) A sternlight, two miles; (d) A towing light, two miles; (e) A white, red, green or yellow all-round light, two miles; and a special flashing light, two miles. (4) In a vessel of less than 12 meters in length: (a) A masthead light, two miles; (b) A sidelight, one mile; (c) A sternlight, two miles; (d) A towing light, two miles; (e) A white, red, green or yellow all-round light, two miles; and a special flashing light, two miles. (5) In an inconspicuous, partly submerged vessel or object being towed, a white all-round light, three miles.