Not Greg, but of course not because if you ever used si you would know that si without Gps would be useless as you would not be able to mark structure. Example you see structure on your si out at 100 feet and with GPS you mark a waypoint for that structure then proceed to go to it---but with no GPS you could not mark the waypoint of it so you will not be able to find it. Oh sure you would know there's structure somewhere out there, but where???


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