DroidNavtex decodes NAVTEX messages from your receiver through the Android phone or tablets microphone or through a connected interface.
NAVTEX broadcasts worldwide on 518 kHz and 490 kHz using a data mode called SITOR-B (amateur radio (Ham Radio) operators might recognise it as AMTOR).
You need to have a receiver which can receive 518KHz or 490KHz SSB to use this app!!
Special audio filters even decode very weak signals through the microphone and make DroidNavtex a very affordable alternative to high priced decoders.
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An “Auto mode” finds the frequency and the sideband of the Navtex signal automatically. With “Auto mode” turned off the frequency and sideband can be adjusted manually.
A built-in database stores the received messages which can then be filtered, sorted and shared. Messages can be deleted individually, in groups or by age.
To save battery power 7 timers can be set to start DroidNavtex at a given time to decode messages. All timers can be set in local time or UTC.