it is navionics app. allows user to shade areas based in depth, plot, speed, etc. and adjust water level to actual so it is accurate.
the control is my GSA controls(gosurfassist). it was added by the original owner.
I'm guessing that's GPS software specific for bodies of water? When I was at Lake Powell I used Google Maps on my phone which was great to tell me where I was on the lake, but I still had to keep a close eye out for shallow areas due to changing water levels. Sometimes those were away from the shore randomly next to really deep areas. The topology of Powell is interesting like that. You see your depth gauge bounce from 300' to 25' while your cruising at 35mph!
Also, what's the controller seen right in front of your throttle? I'm thought all the surf and ballast controls had been inte