Humminbird 581I Fishfinder

Made by: Humminbird
Average price: over $300

The last of the Humminbird 500 series models available in black and white is the 581i combination GPS/fishfinder.

This model is very similar to some of the other 500 series fishfinders: you’ve got a standard 5 inch diagonal screen with 640 by 320 pixels of a resolution, and 16 levels of gray. It also has a dual beam transducer. It operates at the standard 200 kHz and 83 kHz frequencies with a good spread at both 20 and 60 degrees.

The special thing about this model is the built in 50 channel GPS. You can use it as a good marine chart plotter with its very cool 3D view of its included maps.

The GPS is very solid and the unit mounts very well. The retail price is a little high at $350, but we have often found it much cheaper online now that it is a little older. If you can get a good price on this model it’s worth looking into, but if not consider looking at some of the newer color combination models that Humminbird is making.

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