"LS" == Luke Skywalker writes:
LS RST's marker beacon kit.

My Aircoupe came with the RST marker beacon kit built and installed by
the previous owner, an instrument-rated electrical engineer. I'm a
VFR guy so don't use it, but every so often will flip it on for a few
seconds to warm the circuits. Still lights up at maybe 10 years old.
One time on a BFR we flew an instrument approach at a local airport
and it still worked. Nice little item.
--
"My software never has bugs. It just develops random features."