LITVIS


  1. high intensity: non-marine lights with a higher power than marine lights and visible from well off shore (often 'Aero' lights). (adapted from IHO Chart Specifications, M-4)
  2. low intensity: non-marine lights with lower power than marine lights. (Bundesamt für Seeschiffahrt und Hydrographie, Germany)
  3. faint: a decrease in the apparent intensity of a light which may occur in the case of partial obstructions. (IHO Chart Specifications, M-4)
  4. intensified: a light in a sector is intensified (i.e. has longer range than other sectors). (Bundesamt für Seeschiffahrt und Hydrographie, Germany)
  5. unintensified: a light in a sector is unintensified (i.e. has shorter range than other sectors). (Bundesamt für Seeschiffahrt und Hydrographie, Germany)
  6. visibility deliberately restricted: a light sector is deliberately reduced in intensity, for example to reduce its effect on a built-up area.
  7. obscured: said of the arc of a light sector designated by its limiting bearings in which the light is not visible from seaward. (IHO Dictionary, S-32, 5th Edition, 3492)
  8. partially obscured: this value specifies that parts of the sector are obscured.