MARSYS


  1. IALA A: navigational aids conform to the International Association of Lighthouse Authorities - IALA A system.
  2. IALA B: navigational aids conform to the International Association of Lighthouse Authorities - IALA B system.
  3. no system: navigational aids do not conform to any defined system.
  4. other system: navigational aids conform to a defined system other than International Association of Lighthouse Authorities -IALA.