Yes — it comes from NGA Maritime Safety and is refreshed on a schedule.

Can I navigate using this?

No. It is informational only and is not a substitute for the official Notice to Mariners or any other authoritative navigation source.

No. This source is fully key-less.

Yes — free, no download, in your browser.

Navigation Warnings Screensaver

The Navigation Warnings screensaver shows real active NGA broadcast warnings to mariners — wrecks, drifting hazards, live-fire exercises, unlit buoys and GPS interference, by sea area. Informational only, and no substitute for the official Notice to Mariners. It's free, runs in your browser, and ESC exits.

How the Navigation Warnings screensaver works

The background pipeline reads this from NGA Maritime Safety and saves a snapshot the saver loads.

Real active NGA broadcast warnings to mariners — wrecks, drifting hazards, live-fire exercises, unlit buoys and GPS interference, by sea area.

It refreshes on a schedule, so what you see stays current.

Colours can be changed in settings; nothing is stored beyond your own browser.

A worked example

Real active NGA broadcast warnings to mariners — wrecks, drifting hazards, live-fire exercises, unlit buoys and GPS interference, by sea area. Informational only, and no substitute for the official Notice to Mariners.

Settings & tips

Accent and Background recolour the display.
Run automation/run.py navwarnings to refresh the feed.
Press ESC to leave fullscreen.

Frequently asked questions

Is this real data?: Yes — it comes from NGA Maritime Safety and is refreshed on a schedule.
Can I navigate using this?: No. It is informational only and is not a substitute for the official Notice to Mariners or any other authoritative navigation source.
Is a key needed?: No. This source is fully key-less.
Is it free?: Yes — free, no download, in your browser.

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