Hi guys, Would you please help me figure out if there's a way to use Galaxy S4's GPS receiver for tracking location in the Sea? To be exact, my brother is a sailor, and he spends most of his time in the sea with no cellular connectivity. Is there a way I can locate his position from home? Like an app that uses GPS location on that phone to locate in the map where it actually is? I need your prompt input for this question. This really is a big concern for us. Thanks a ton in advance!