Ilma, a Navtex Receiver for Raspberry Pi
Ilma is a Navtex decoder designed for the Raspberry Pi, aimed at sailors needing reliable weather forecasts and navigational warnings. It operates using low power and saves radio broadcasts as audio files, which are then decoded and stored in a database. This system offers a headless service that can send alerts via a web interface and push notifications, making it a practical choice for offshore sailing.
- ▪Ilma is built for the Raspberry Pi to decode Navtex messages for sailors.
- ▪The system operates on low power, making it suitable for use on sailboats.
- ▪Navtex is a free international service that broadcasts navigational warnings and weather forecasts.
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← All posts 25/05/2026 Ilma, a Navtex Decoder for the Raspberry Pi I’m a sailor and I built a Ilma,1 a Navtex2 decoder for the Raspberry Pi. Getting weather forecasts and navigational warnings is essential when sailing offshore. The Pi receives radio broadcasts, saves them as audio files and decodes them using multi-level error correction. The Navtex messages are saved in a database3 and accessible via web interface and push notification. ⇨ Ilma’s website The Raspberry Pi Zero 2 W in a project box with a knob encoder and a small OLED display.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Sailing through Code.
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