Like a few others, I have a Airmar p79 shoot thru.
THe most confusing thing is not the installation, it is if you ever want to change chart plotter / fish finder aka depth sounder. You can't just swap it out, as every brand, actually even every model within its own brand seems to require a different bloody transducer and or connection. Head scratching bizzare and the websites of these companies are sh#t as far as info goes, and customer service non existent when your are trying to figure out what inhull transducer to get for which chart plotter.
It's all set up for fish boats with tho