Answers as promised:-
The original one appears as en-route because it covers the LARS service rather than just the aerodrome.
The one Shy Torque quotes appears in the En Route section because its scope is AE. Under ICAO each NOTAM can have one or more of the following scopes:-
A - Aerodrome
E - En-route
W - Nav Warning
More info on the make-up of a NOTAM
here..
In theory ICAO requires one NOTAM per item, which can produce a daft result. One NOTAM to say the a/d is closed, another to say the runway lighting is not available, another to say the threshold lighting is not available, etc. etc.
In practice they combine them so this one tells you:-
1. The licensed hours of the AD are different to what the AIP says
2. The ATZ hours are different to what the AIP says
3. The ATS hours of operation are different to what the AIP says.
Three different items all in one NOTAM.
So why is it in the en-route section as well as in the aerodrome brief?
Because it frees up the airspace outside the ATZ hours, making it uncontrolled. Therefore it's given the scope AE (Aerodrome and En-route) so that it appears in both briefs and anyone passing nearby can see that they are clear to transit the ATZ out of hours.
TD&H
The documentation on the AIS website (FAQ and PIB Help) is good and accurate. In addition AIC 90/2004 (White 105) is useful.
The Flyer article is not really suitable for putting on the site because the printed page with graphics does not readily translate on to a screen, the screen resolution being far inferior. I'll see if I can find my copy and point you at the right issue.
I gather there is some thought being given to producing an HTML guide but bear in mind that this activity is funded by NATS out of aerodrome and en-route charges which we, in the main, do not pay.
I'm indebted to Barry Davidson, Quality Manager at UK AIS for providing me with the info I needed to answer this.
