2 Navigation in Ocean Waters
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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 - 2 Navigation in Ocean Waters

2 Navigation in Ocean Waters

  2.1 Where a radionavigation system is used to assist in the navigation of ships in ocean waters, the system should provide positional information with an error not greater than 100 m with a probability of 95%. This degree of accuracy is suitable for purposes of general navigation and provision of position information in the GMDSS.

  2.2 In view of the fact that merchant fleets operate worldwide, the information provided by a radionavigation system must be suitable for use for general navigation by ships engaged on international voyages in any ocean waters.

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

  2.4 The radionavigation system should permit an update rate of the computed position data not less than once every 2 s.

  2.5 Signal availability should exceed 99.8%.

  2.6 An integrity warning of system malfunction, non-availability or discontinuity should be provided to users as soon as practicable by Maritime Safety Information (MSI) systems.

Parent topic: Appendix – Operational Requirements
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