that's a good question i've been trying to figure out too. it's listed in the "Marine:Great Lakes" app as well as the "Lakes:Canada" app. i'm not entirely clear on the difference between the "Marine" and "Lakes" versions. i'm assuming the Lakes one is more fishing-specific and the Marine one is more for navigation purposes? Lakes: http://www.navionics.com/MobileLakeFeatures.asp?MobileType=Android Marine: http://www.navionics.com/MobileMarineFeatures.asp?MobileType=Android |