This is a sub-system which can be added to any carrier.
These files add a functioning Fresnel Lens Optical Landing System (FLOLS).
The orange/red 'source' lights are illuminated according to the position of
the pilot's eye above/below the 3.5 deg glide slope. The apparent position
of the source light relative to the fixed green datum lights allow the pilot
to 'fly the meatball'. The green 'cut' lights flash when the pilot's eye is
below the coverage of the lowest (red) source light.
TODO - add rules for the operation of the wave-off lights.
