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PhosphorTEX is a real-time NAVTEX maritime-safety decoder for iPhone. Tune a shortwave receiver to 518 kHz, 490 kHz, or 4209.5 kHz, hold your iPhone near the speaker, and watch navigational warnings, gale warnings, ice reports, and other maritime safety information scroll across an authentic amber phosphor CRT display. NAVTEX (Navigational Telex) is broadcast worldwide under the IMO Global Maritime Distress and Safety System (GMDSS). Every coast, mariners and ship's radio officers depend on it
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