12. Significant malfunctioning of radio-navigation services and shore-based maritime safety information radio or satellite services
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1310 – Revised Joint IMO/IHO/WMO Manual on Maritime Safety Information (MSI) – (8 June 2009) - Annex - 7 – Guidance and Examples for Navigational Warnings by Type of Hazard(as Listed in 4.2.2) - 12. Significant malfunctioning of radio-navigation services and shore-based maritime safety information radio or satellite services

12. Significant malfunctioning of radio-navigation services and shore-based maritime safety information radio or satellite services

 The text of a navigational warning in this category shall contain message elements 1, 5, identified and ordered, as in Message Elements Table Figure 3.

Standard Remarks Comments
OFF AIR Do not use “Until Further Notice” since the fact that the event is complete will always be apparent from the cancellation message.
UNSTABLE
REDUCED POWER
INOPERATIVE
UNUSABLE Back-up facility should be included if one is available.
DISCONTINUED
   

Note i) Messages concerning long-range electronic navigational aids will not normally need the message elements; General area, Locality or Chart number.

Note ii) If a definitive time is quoted for the outage, the message cancels 1 hour after event completes.

   
EXAMPLES OF WARNINGS IN SECTION 4.2.2.12
   
Parent topic: 7 – Guidance and Examples for Navigational Warnings by Type of Hazard(as Listed in 4.2.2)
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