My main fishing ground is the Indian River
here on Florida's Treasure Coast
, sight fishing in 2-8' of saltyH2O, so all the bells and whistles aren't really needed.
All I truly need to know is depth, temp and bottom (holes & ledges), but I also needed a unit that will hold it's own when fishing deeper blue waters & freshwater too.
The GPS/chartplotter is nice for fishing new areas (& getting home) and really nice for marking honey holes (when fishing with others!
After much research, opinion requests & budget review, I opted to go with the Lowrance Mark-4
Gray-Matrix FF/GPS unit for my PA-12.
Inexpensive, easy to operate (& read) and the install was pretty much painless.
I went with a Humminbird
12v 7ah gel battery w/charger due to the in-line LED indicator on the wall charger (charging, charged & short). I mounted the battery (along with mounted fuse holder) in a WalFart
H2Oproof box....more than enough juice for several trips. Box stores inside the hull, just to the rear of the center hatch.
BTW- I bought the RAM
mount for "Mark Series" (eliminates the stock mount) and am very happy with it!