i gotta say that i think mine does a bit better than 15', 5' probably not but 15 is a bit to far off, though i know it has to do with gps signal strenght too. it will not keep you on a dime but it is still a neat feature but i rarely use mine. what gives me trouble is that if you hit anybutton it disengages the spotlock, and sometimes with mutliple rods going down at one time my big feet hit a button on the foot control and disegages it.