About touch screens: an overhyped invention.
I used to have a cell phone that operated with buttons. My new cell phone uses touch screen, but also has a sliding keyboard. (Voice activation is of course a very handy feature ... if you like to use that app). I entered numbers a lot faster on the old 4x3 keypad than on a touch screen. I did it by feel.
With my new phone, I find the difference similar. I enter data faster, and with less visual field attention that with a touch screen.
As that pilot noted, touch screen requires too much attention as compared to tactile senses aiding your visual senses in keying in information or data into a system.
If you set up a 4x3 pad for radio freq selection, it is easy to key in numbers without having to look at them. Same is true with switching pre channelized freqs by feeling the number of clicks as you go up or down a channel selector.
Simple stuff, none of which requires visual field task sharing.
Further comments
