elite4 gps help

[ctrujillo]

i went out last weekend and was a little foggy so i figure no problem ill just lock down my position at harbor mouth and head out.well could not get it to lock in my position i say f it and head out anyways.well it got preety thick and i tied off to the kelp and it adventually moved on.this was the first time that i tried to use the gps on this unit.so ive been reading the manual and fing with the thing and it will not find my position.am i doing something wrong maybe the gps function is no good on my unit anyone else have this proublem