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Ilma, a Navtex Receiver for Raspberry Pi

https://code.sailorslog.io/blog/2026-05-06-ilma-navtex-decoder/

by sailingcode • 2 months ago

3 1 2 months ago

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code.sailorslog.io

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sailingcode• 2 months ago

I built this on a Pi Zero 2 W because of its low energy consumption when it's running continuously on a boat. Navtex is a 1970s radio technique that delivers navigational and meteorological info and has forward error correction built in. For the characters that still slip through, I added a small n-gram model. An LLM wouldn't fit on the Pi.

I also work on an RTTY mode that hasn't got any built-in error correction. Does anyone have ideas for correcting characters dropped during radio transmission?

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