I don't think Basecamp can display maps from his GPS 72 either.... in fact, I don't even think the 72 can display maps itself.
https://buy.garmin.com/shop/shop.do?cID=167&pID=214 Quote:
Basemap: no
Preloaded maps: no
Ability to add maps: no
Built-in memory: no
Accepts data cards: no
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But, given a more modern unit, I think Basecamp can only display maps that Garmin themselves have compiled, like the pre-loaded City Navigator on a Nuvi, the pre-loaded topo on an Oregon 450 or a Garmin 24k pre-loaded data card. It isn't able to open user-created gmapsupp.img files. I guess the logic is that you should already have that mapping data on your computer anyway.
Getting back to the question though, forget Basecamp because it isn't part of the nRoute equation at all. It doesn't do live GPS tracking, it's just for managing your maps, waypoints, tracks, etc.
You need to install some maps into nRoute as Terry has said. If you don't have any, see if you can find something you like here:
GPSFileDepot - Custom Maps, Ximage hosting, tutorials, articles and more for your GPSr
Then you need to get your GPS72 talking to your computer. Your old model uses a serial interface. Do you already have cable that does this (with either a serial port on the laptop or a USB adaptor)? If not, IMO it wouldn't be worth the cost when you could buy a modern USB GPS receiver that will be much better than your old unit for under $40.