for what it is worth ($96.87) you still need to buy a blank garmin 256 mb card or two @ $125 +- You get 1 unlock code with your purchase then you need to unlock the other region, and there are two regions for Bahamas, you will pay more $$. This all presumes that you have the correct cable to get from your, oooops it only works on a PC not a Mac.......never mind.

Save your old 176C as a back up......

Kind of a P.I.A......that is one of the reasons why new Garmin machines have built in charts......