Sorry for the late response back... It's because I have 2 kayaks which aren't easy to get up on my Navigator (one I can't get up on my own), so I am wondering how many inches less the H3 height with the Adventure Package is then the Navi.. The kayak racks attach to the roof rack on my Navi so hopefully when I get the H3 it will fit on those roof racks. Thanks for the help!!
