I’m hoping to purchase a Ghost in the near future. Am I understanding correctly that if, after doing the initial spot lock calibration, I go to a lake that’s 50 miles away, I would need to calibrate again for spot lock to work correctly? If that is the case, is this something you have to do every time you go anywhere new? Do you have to recalibrate once you get back to your home lake? Sorry, I’m just not understanding since I don’t have to do anything with my GPS on my depth finder, just wait for it to acquire my position.