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| Jerry, Once you figure out how to make maps and if you want to troll an edge on it you will need to do the following. The point 1 antenna is a real helper for allowing you to follow the edge. With the heading sensor you can keep the boat following the exact line you need. Just keep the heading line displayed on the map lined up with your marks. You also must use the antenna on your bow unit so that you can make corrections sooner in your coarse. The problem is even though the antenna provides location up to 10 times a second , the fastest the unit updates the map is 1 time per second. This allows for a lag time between actual location and the time the map updates it. The internal antenna is pretty good on the HDS2 units and will provide a fairly accurate location. The point 1 is used for heading, direction and will provide compass readings even when stopped.
The point 1 is normally mounted in the rear of the boat. This is because the trolling motor will cause magnetic interference with it and your heading will be in error. It is also closer to your transducer thus providing more accurate waypoint markings. Use the point 1 for heading and the bow mount for location when trolling. | |
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