Subelement F: Maritime Safety Information (M.S.I.)— Topic :
Question 37F5
Element 7R (GMDSS-RO)Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally?
Explanation
518 kHz is designated as the primary international NAVTEX frequency. This medium frequency (MF) is exclusively used for broadcasting critical navigational and meteorological warnings, search and rescue information, and other urgent safety messages to ships worldwide. It forms an integral part of the Global Maritime Distress and Safety System (GMDSS) for disseminating essential maritime safety information.
Conversely, 2187.5 kHz and 4209.5 kHz are Digital Selective Calling (DSC) frequencies used for automated distress, urgency, and safety *calling* on the MF and HF bands, respectively, not for receiving NAVTEX broadcasts. VHF channel 16 is the international voice distress and calling channel for short-range communication. These alternatives serve different functions within maritime communication regulations.
Related Questions
37F3 What should a GMDSS Radio Operator do if a NAVTEX warning message is received but it contains too many errors to be usable?37F4 Which of these cannot happen when a paper model NAVTEX receiver runs out of paper?37F6 What is the transmitting range of most NAVTEX stations?38F1 How is a NAVTEX receiver programmed to reject certain messages?38F2 How can reception of certain NAVTEX broadcasts be prevented?