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| Gps fishfinder combos for gps navigation and tracking as well as fishfinder capabilities |
| from leading manufacturers like Humminbird, Garmin, Raymarine, Eagle, Furuno, Lowrance and Northstar. |
| The fishfinder uses active sonar to detect fish and the bottom and displays them on a graphical display device. |
| The modern fathometer is designed specifically to show depth, so it may use only a digital display instead of a graphical display, |
| and frequently will have some means of making a permanent recording of soundings. Both are instruments of navigation and safety. |
| both can show fish and the bottom of a river, lake, sea or the ocean and have combined |
| GPS technology, digital chart-plotting, radar and electronic compass displays in the same affordable sporting unit. |
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