Do you know what the NAVDAT system onboard ships is?
The NAVDAT (Navigational Data) system is designed to broadcast digital messages to ships at sea using both Medium Frequency (MF) and High Frequency (HF) bands. Specifically, it operates on the 500 kHz frequency in the MF band and the 4226 kHz frequency in the HF band, along with other maritime frequencies allocated for NAVDAT use.
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