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Sorry guys for sounding dumb her but are you talking about the gps unit it self or are you talking about the difference between the lakemaster card that i have and the navionics card.
A Garmin Lakemaster chip will not work in a Lowrance unit, and a Lowrance Lakemaster chip will not work in a Garmin. The Garmin chip and the Lowrance chip are different products with different lakes programed on them, even though they come from the same company.The Garmin Lakemaster MN and WI chips have more lakes on them than the Lowrance Lakemaster MN and WI chips.If you choose to use Lakemaster software chips, you are better off with a Garmin unit than a Lowrance unit due to the expanded lake list.Navionics chips are NOT compatible with Garmin, only Lowrance and some other models.Soooooo,If you prefer Navionics software, purchase a Lowrance unit.If you prefer Lakemaster software, purchase a Garmin unit.Like I said: choose your software first, because this may sway your decision between Garmin and Lowrance units. It would suck to buy a GPS unit and not be able to get the software you want.I hope this makes some sense.
A question for you Lowrance users....1) Is the base programming on the unit supported by Lowrance? Can you go to a website and download updates for your unit?2) Is the Navionics software any good? Does it have all the back roads and trails on it like Lakemaster?
Garmin GPSMAP76csx or GPSMAP60csx are great choices. Use the lakemaster chip with both of them.[/quothe 76csx is better it floats and if you are like me if its lose it falls down the hole!!