Just thought you'd like to see the workings on the airfield during a flight check of the PAR.
You can use any A/C that will give you a good target.
The herc will suffice.
Got cal'd theodolite?
Set it out on the runway.
Perfectly centered on the runway on the 3 degree mark.
And wait....
... and wait ...
... and wait ...
... and wait ...
Until they call you up and say they're inbound. Then you look for them.
And tell them which way to go.
Then wait after they've passed over.
... and wait ...
... and wait ...
... and wait ...
Then do it again.
Telling them where to go.
All the while they're watching the plane come in on the PAR display.
Any questions just ask.