Shawn I would be interested (see pm).
I recall an experimental HUD installation which had a non linear pitch scale – above xx deg (horizon out of view), the scale decreased in relation to the real world. The scaling reversed at 90 deg. This resulted in disturbing sensations where the body sensed pitch rate did not agree with the display – just try a loop! I have a lingering memory that some aircraft used this system operationally, anyone recall if this was so?
I wonder if the Marinvent displays might have similar qualities, where the scalar speed acceleration or altitude change differ from reality. Whilst this was not a point of concern in early EFIS, other limitations of the small displays resulted in ‘crutches’ of airspeed trend vectors and wedge shaped altimeter pointers.
The above reinforces the point that there can be marked differences between a static cockpit evaluation where equipment of a known standard replaces older systems, and the installation of new, innovative displays. The latter, and sometimes the known equipment, require flight evaluation.