Humminbird waypoints and routes (.hwr) (humminbird)
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## Humminbird waypoints and routes (.hwr) (humminbird)

This format can...

- read and write waypoints

- read tracks

- read and write routes

This format supports:

Humminbird waypoints and routes (`.hwr` files)
Humminbird tracks (`.ht` files)
Humminbird `.dat` files. (These accompany the `.png` files you get when you take snapshots. There are also `.dat` files generated when making recordings, but those are not supported here.)

If you do "save all nav data" on the device, you'll get a `data.hwr` and a `000.ht` file on the flash card (on a 797 in the `matrix` directory).

The humminbird module can read all of these file formats, but you need to tell it which ones to write. By default, you get a `.hwr` file, to get a track (`.ht` file), use the "humminbird-track" format.

Note:`.dat` files are read-only, they only make sense together with their images.

Supported models:

797c2i SI

(They should all work, but this is the only one tested so far.)

Known limits:

max 12 characters for waypoint names.
max 20 characters for route and track names.
max 50 points per route. Use simplify filter (count=50 or less) if you have routes with more points!
max 21835 points per track.

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