PhosphorTEX

NAVTEX DECODER

Real-time NAVTEX maritime-safety decoder. 518 kHz gale warnings, SAR alerts, ice reports — CCIR-476 SITOR-B via your iPhone or iPad microphone. Native on iPad in every orientation.

NAVTEX decoder app for iPhone and iPad. Decode live maritime safety broadcasts on 518 kHz, 490 kHz, and 4209.5 kHz from a shortwave receiver using your microphone. Full CCIR-476 SITOR-B decoding with DPLL clock recovery, automatic polarity and AFC, per-message error statistics measured against the second copy of every character, a 512-point FFT waterfall, and a built-in schedule of 43 NAVAREA coast stations. Runs natively on iPad in every orientation, the cards, spectrum, waterfall and station schedule opened out across the full width of the screen. Essential GMDSS reference for mariners, radio officers, and shortwave listeners.