It is an interesting argument , the whys and wherefores of these miserable little bits of kit they are like marmite. I personally hate the bloody stuff .
If it wasnt for these things the IR could be condensed into about 20 hours ish.
The daft thing is if you look at the only approved gps approach in the uk (I think its the only one) Shoreham have alook at the missed approcah procedure , back to the beacon
Bizarre