Rich
It does both, its switchable between Marine & Automotrive, yes the memory cards are garmin only but a 256 card can be had for £90 these days.
The 276 C is supplied with the Atlantic basemap for road routing at 530 Euros and comes with a 9 way cable, marine mount, trip & waypoint manager software, mains charging adaptor, Li-Ion battery, and manuals, then you will need the Automotive kit 272 Euros this contains a 256 mb chip, Mapsource City Select V7 mapping with all regions unlocked, car beanbag mount, lighter socket power cable & speaker, and a couple of base stickers.
Total cost £534 shipped free, this gives you all the automotive capability, a 256 mb chip will hold all the UK on 150 Mb, the V7 mapping is far more detailed than my previous version.
If you want to use the marine mapping you need the Bluechart V7 marine maps which come with with one region unlock code, you choose the region, 155 euros, the unit will hold both land and marine data simultaneously and you can use both, the maps are loaded on the same chip so you can mix land and marine for the place your'e going.
The cable has bare wires at the end so you can configure what you need, there are no crappy jackplugs to get wet, i've just used the power and voice outputs but the device supports depth sounders, fish finders, Loran ETC on two data channels.
This is a very powerfull device and is not just plug & Play, but once configured for your use is much better than any other, the display is superb and some of the marine functions cross over to land, the proximity alarms is intended for hazards that are visible at low water and submerged at high but are also very handy for speed cameras, a proximity circle can be set so yopu get advance warning of your choice.
The photographers will like the celestial data that displays the bearing of the sunrise & sunset for any location on any date, Tide data is also handy but only fully functional with Bluechart software.
You need to see one.
I have it on a touratech bar mount just like any other GPS, the pedestrian feature is handy when your'e visiting places like Paris or Bruges, it will ignore one way streets so you can walk around freely, the battery lasts about 8 hours.
