Oh yeh, forgot to mention Worldmap is a marine unit and as anyone knows when the word aircraft is mentioned the price goes up 10 times.
++++++++++++++++ I have a Lowrance now and it works a treat. My first attempt was also a cost-saver, but it turned out to be a bad idea - check out the non-aviation GPS carefully. I bought a non-aviation Garmin for a great price. I was very happy with my new toy - it worked fine in the car but it would not work in the airplane. After much frustration I learnt that it would not function over certain speeds - not sure now, but I think it stopped registering after 70mph. Take care Steve J