What is Admiralty List Of Radio Signals or ALRS and its volume?

1. Six volumes published annually .
2. Corrections for these are issued every week under section 6 of the weekly notices to mariners.

Volumes of ALRS

ALRS VOLUME 1: NP – 281; Maritime Radio Station, Public Correspondence.

ALRS VOLUME 2: NP – 282; Radio Aids To Navigation, Satellite Navigation Systems, Differential GPS (DGPS) Legal Time, Radio Time Signals And Electronic Position Fixing Systems

ALRS VOLUME 3: NP – 283; Maritime Safety Information Services.

ALRS VOLUME 4: NP 284; List Of Meteorological Observation Stations.

ALRS VOLUME 5: NP – 285; GMDSS(Global Maritime Distress and Safety System).

ALRS VOLUME 6: NP – 286; Pilot Services And Port Operations, Vessel Traffic Services And Reporting Systems