I own a 788C (w/ external GPS antenna) that I have mounted at the rear of my 18 foot tiller and I have been EXTREMELY HAPPY with this unit. My lovely wife tried to purchase a second unit as a Christmas gift to replace an old Lowrance I have in the bow, only to discover the 788C has been discountinued and only the 788CI (internal GPS antenna) is available. My issue is the unit I am replacing is mounted on the floor at the front of the bow kind of tucked up against the gunnal - I can not mount the unit on the top of the bow (the triangle part) as my trolling motors covers most of that area and the motor cables swipe across the are not cirectly covered by the motor itself. My question is - how much of the horizon must a unit with 50 channel internal antenna see? If it can see 1/2 of the horizon, will it work o.k.? If not, I have to spend another $150 for an external antenna.
Thank You in advance !