i have a garmin gpsmap 76csx that i use while fishing and i do like it a lot.but that being said ive found that a commend old little rock that i though down on the ground and then marked a waypiont in the same spot was smarter than the gps. all im saying is that unless you want to pay alot more money i dont think that you will be able a achieve what your wanting unless you use a marker.sorry