My reason for buying the S7 was for boating in the summer. First app I bought was Navionics for charting and navigating. My concern has been where to put the S7 when under way, as my Garmin portable GPS (several years old), wants to have clear line of sight. I downloaded a free app from the Android Market called "GPS Test," fired it up while sitting in my living room, and lo and behold the S7 sees nine satellites, and will give accuracy to within 20 feet. Nice! I am very impressed with the S7.