AISDECODE(1)

💖 NAME 💖

aisdecode — a Library for decoding maritime AIS messages, bestie 💅

It lives in section 1 of the manual, aka User Commands, so yes it's a real grown-up command you can just run at your prompt, no cap.

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✨ SYNOPSIS ✨

aisdecode [OPTIONS] < INFILE.nmea > OUTFILE.json

Ok so picture this: nmea goes in, json comes out 🦋 you feed it a file on stdin and it hands you a decoded file on stdout, and the [OPTIONS] in the middle is where all the ~personality~ happens.

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🎀 DESCRIPTION 🎀

It decodes maritime AIS messages. That's the whole vibe. Ships, signals, decoding, slay ⭐

🌸 Available opptions: 🌸

(that's the section's own spelling right there, and honestly? iconic, we're not touching it 🫶)

• --gpsd — Use gpsd compatible output.
• --copy-tagblock-timestamp=False — listed exactly like this, no description given, respect the mystery 🙈
• --encoding=msgpack — Use msgpack encoding.
• --encoding=json — Use json encoding (default), so if you say nothing you're getting json, periodt ✨
• --keep_nmea — Include the raw nmea as a field in the decoded output.
• --verbose — just --verbose. that's it. that's the whole description. it's giving minimal, it's giving main character energy 💅
• --max_errors=NUM — Terminate if error rate is > NUM%. like, it will actually stop the whole thing if the errors get too loud 😭
• --allow_unknown — listed with no description, we simply vibe with it 🙈
• --ignore_tagblock_station — no description given, but it's here and it matters 🎀
• --treat_ab_equal — no description given either, the page keeps it lowkey mysterious 🌸
• --pass_invalid_checksums — again, no description, just the flag itself, sitting there being alluring 💀
• --allow_missing_timestamps — no description, but the name is doing a lot of work fr fr
• --uscg=False — listed exactly like this, no description, no notes 🫶
• --validate_checksum=False — listed exactly like this too, no description attached 🌈

Bestie note: everything above is verbatim from the page — I'm not guessing at what any of these do beyond what's written, so if it says nothing, it says nothing, and we do not invent facts in this group chat 💜

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🧚 the cute sign-off 🧚

This one ships from Debian and the page is dated March 2026 🎀 so that's your source, that's your version, that's your date, all wrapped up with a bow. Go decode something, you've got this 👑💖