Types of service

4-2-025

1. Beacon service

A service provided independently of weather conditions, the station transmitting signals at certain fixed times daily or continuously.

Reference: A.L.R.S. (modified)

2. Clear weather transmission

Signals transmitted during clear weather by a station whose service is extended during periods of fog or low visibility.

3. Fog service

The service provided by a radio beacon as an aid to navigation during periods of fog or low visibility.

4. Calibration service

A service provided for the purpose of calibration of direction finders.

Reference: A.L.R.S. (modified)

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

English