Purpose:
To provide an instrument flying training aid for the instruction of student pilots

Components:
This instrument flying training aid is composed of two components:
A polarized film applique that is applied to the windscreen of the trainer aircraft
A pair of opposing polarized glasses worn by the student pilot

To Use:
Since the film applique and the glasses are purposely polarized in opposite directions, when the glasses and only when the glasses are donned, the student pilot cannot see outside the front windscreen, simulating IFR conditions.
The student pilot can still see the interior of the cockpit and all of the instruments as these are not affected by the polarization.
The student needs only to remove his glasses to regain full outside visibility.
The instructor (w/o) the glasses retains full visibility during the training.