RE: GPS
Gulf Cart hit it on the head. More than likely your antenna is caput, needs an update or is just not plugged in well.Check the connection and if it's ok call Lowrance. They've had problems with their antennas and are usually very generous and fast when it comes to replacement even if out of warranty.
About the contours, you will need to adjust your settings in the menu. If you don't have a manual go to the lowrance website and you should be able to download or view one there. Good luck and let us know how things work out.
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