Above is Raymarine's new RayControl app running on my iPad1 and the screen is purposely busy because I was trying to stress it.  While a NMEA 2000 data simulator tells the test e7 MFD it's going 40 knots up the Bay with one chart window Head Up in 3D and the other North Up, I could still sit in my office -- 40 feet and a "deck" away -- and select/display a tide station with my finger without a noticeable lag. I did manage to crash the app's WiFi connection to the e7 once, but Ray actually ...