Aerad charts

[Brian Bristow]

Here's a chance to have questions answered by Aerad as to 'why do they do that?' 'what does this mean?' etc, as Aerad is aware that there have been many changes over the last few years to the charts both large & small.
Remember we publish State information and can't modify these things even if we'd wish to. What we try to do is present the data from all Countries in a clear & consistant way.

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[This message has been edited by Brian Bristow (edited 10 January 2001).]

[This message has been edited by Brian Bristow (edited 15 January 2001).]

[Propellerhead]

Still don't understand why there is a difference between green page and Approach plate minima - are they both JAROPS, or is one ICAO. When will this be resolved, and will the green pages eventually disapear?

Also, bit confusing that the vertical profile for some ILS' show you levelling off at DA - this is where it is a combined ILS and LLZ only plate, so I guess the vertical profile is showing MDA for the LLZ?

Generally much better though, and far better than Jepps.

Just confirm also :

RDH - height at which the lowest part of the aircraft acieves over the threshold when on the ILS Glidepath?

[Brian Bristow]

Our new style approach plates came out under a system which used a different 'rounding' to the Green Pages, so figures differed by 5ft. All figures are to JAR OPS standard, but we've chosen to round to 10ft, not 5ft as we did before. The problem is now sorted, but it'll take a little time before all 'old' pages are amended. If a difference exists then use the Green Page figures as they are rounded to 10 ft which we'll be showing from now on. The Green Pages will stay as they show ALL minima to all possible approaches at an airfield, whereas the approach plates show minima only relevant to that approach. The vertical profile, as you say, is a combined ILS & LLZ; the aim being no page turning in event of G/S failure, unless the LLZ profile is very different, in which case there is a separate chart.
RDH - height of G/S above threshold, ( ie the antenna) not necessarily the lowest part of the a/c.

[This message has been edited by Brian Bristow (edited 15 January 2001).]