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I need a little education on GPS'. I've been toying with idea for some time but I can't see spending $400 on a unit.

I do, however, want one that is pratical for use in the air (flying experimental aircraft), on sea (on a boat), on land (typical land nav), and for use when traveling by vehicle.

From my limited reserach I believe a few things are necessary - internal memory, upgradable memory (SD card?), mapping and PC capable. Is my assumption correct or do I need more or less? One thing I don't need is color.

I found a Brunton Atlas that appears to be everything I need at a very reseaonable price as far as GPS' are concerned. Anyone know about these?

[QUOTE="TonyD, post: 4069, member: 5"] I need a little education on GPS'. I've been toying with idea for some time but I can't see spending $400 on a unit. I do, however, want one that is pratical for use in the air (flying experimental aircraft), on sea (on a boat), on land (typical land nav), and for use when traveling by vehicle. From my limited reserach I believe a few things are necessary - internal memory, upgradable memory (SD card?), mapping and PC capable. Is my assumption correct or do I need more or less? One thing I don't need is color. I found a Brunton Atlas that appears to be everything I need at a very reseaonable price as far as GPS' are concerned. Anyone know about these? [/QUOTE]

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