A
Anonymous
Guest
I bought a used GP7000F chartplotter/sonar. There is a round opening on the bottom side of the unit that I cannot figure out. It has residual adhesive around it like maybe it was previously plugged and I am thinking it was for factory service. I would really like to know if I should close this opening or if it is necessary for moisture to escape. Here is link to picture. Thanks for any help.
https://www.snapfish.com/photo-gift/sha ... 0/SNAPFISH
https://www.snapfish.com/photo-gift/sha ... 0/SNAPFISH