Review on Advanced Humminbird 440440-1 688ci HD Internal GPS/Sonar Combo Fishfinder (Black) - The Perfect Fishing Companion! by Kiko Fanandriansyah
River travel tracking
Good tool for river travel. I use this unit on Alaska's shallow rivers with lots of gravel and sandbars. It's great for plotting my course so I can navigate the channel, especially when conditions change making it difficult to 'read' the flow. You can use a good Alaskan river map pack.
- GPS speed
- Not bad
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