ARM 12.11.315. LIGHTS

(1) Lights required on motorboats or vessels on waters of this state: (a) in operation between sunset and sunrise; (i) motorboats and sail power auxiliary boats less than 26 feet; (A) display one white light aft on rear of vessel to show all around the horizon 32 pts. (360 degrees) higher than the bow light visible for two miles; (B) a combination red-green light or separate lights on the forepart of the boat showing green to starboard (right side) and red to port 10 pts. (112.5 degrees) visible for one mile; (ii) motorboats and sail power auxiliary boats 26 feet to not more than 65 feet; (A) same as (A) above; (B) same as (B) above except red and green lights must be separate lights with screens to prevent being seen across the bow; (C) a white light as far forward as practicable to show an unbroken light of 20 pts. (225 degrees) visible for two miles; (iii) sailboats (sail alone); (A) white light aft showing 12 pts. (135 degrees) visible for two miles; (B) red and green lights forward same as motorboats under 26 feet; (b) lights for use when anchored: (i) power boats under 65 feet and all sailing vessels at anchor must display anchor lights except those in special anchorage areas (an anchor light is a white light visible to a boat approaching from any direction and is displayed in the forepart of the vessel); (ii) rowing boats whether under oars or sail shall have ready at hand a lantern showing a white light which shall be temporarily exhibited in sufficient time to prevent collision.