Doug wrote:

Also, I think Marker Beacons are nice to have,
though not legally required for ILS's. It is good to have that aural
warning at the middle marker.

IIRC, there are also approaches that have lower minimums for the ILS with an MBR
than without.

George Patterson
Why do men's hearts beat faster, knees get weak, throats become dry,
and they think irrationally when a woman wears leather clothing?
Because she smells like a new truck.