Re: Nmea 2000 transducer(s).....
There will be no problem with what you suggest, and you won't need a switch. To change between the two transducers, just go into the sources menu and choose the one you want.
You can also set each one to display on separate MFD's, if you have multiple MFD's.
You do not need a parachute to skydive. You only need a parachute to skydive twice.