3 Navigation in Harbour Entrances, Harbour Approaches and Coastal Waters footnote
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Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.1046(27) – Worldwide Radionavigation System – (Adopted on 30 November 2011) - Annex – Revised Report on the Study of a Worldwide Radionavigation System - Appendix – Operational Requirements - 3 Navigation in Harbour Entrances, Harbour Approaches and Coastal Waters1

3 Navigation in Harbour Entrances, Harbour Approaches and Coastal Waters footnote

  3.1 Where a radionavigation system is used to assist in the navigation of ships in such waters, the system should provide positional information with an error not greater than 10 m with a probability of 95%.

  3.2 Taking into account the radio frequency environment, the coverage of the system should be adequate to provide position-fixing throughout this phase of navigation.

  3.3 The radionavigation system should permit an update rate of the computed position data not less than once every 2 sfootnote

  3.4 Signal availability should exceed 99.8%.

  3.5 When the system is available, the service continuity should be ≥99.97% over a period of 15 minutes.

  3.6 An integrity warning of system malfunction, non-availability or discontinuity should be provided to users within 10 s.

  3.7 The system shall be considered available when it provides the required integrity for the given accuracy level.

Parent topic: Appendix – Operational Requirements
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