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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
1 Thruster Demand/Feedback Error
2 Identify (I)
Used for course plotting
To further assist in navigational calculations
9 The Berth
Admiralty List of Radio Signals (ALRS): Meteorological Observation Stations (NP284), 7th Edition 2026 AHO - Misc. 1 Thruster Demand/Feedback ErrorAbout the Admiralty List of Radio Signals (ALRS) The Admiralty List of Radio Signals series provides comprehensive information on all aspects of Maritime Radio Communications. The data is organized into six volumes, some divided into several parts for ease of handling. Each of the six volumes is presented in a user friendly format with full color photographs and diagrams. The contents range from a complete listing of stations handling Maritime Public