1. (1) Lights required on motorboats or vessels on waters of this state:

   1. (a) in operation between sunset and sunrise;

      1. (i) motorboats and sail power auxiliary boats less than 26 feet;

         1. (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;
         2. (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;

      2. (ii) motorboats and sail power auxiliary boats 26 feet to not more than 65 feet;

         1. (A) same as (A) above;
         2. (B) same as (B) above except red and green lights must be separate lights with screens to prevent being seen across the bow;
         3. (C) a white light as far forward as practicable to show an unbroken light of 20 pts. (225 degrees) visible for two miles;

      3. (iii) sailboats (sail alone);

         1. (A) white light aft showing 12 pts. (135 degrees) visible for two miles;
         2. (B) red and green lights forward same as motorboats under 26 feet;

   2. (b) lights for use when anchored:

      1. (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);
      2. (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.

Authorizing statute(s): 23-2-521, 87-1-301, 87-1-303, MCA

Implementing statute(s): 23-2-521, MCA

History: NEW, 1980 MAR p. 1063, Eff. 3/28/80; TRANS, from ARM 12.6.704, 2001 MAR p. 18, Eff. 1/12/01.