Lido charts threshold coordinates

[bringbackthe80s]

Hi guys where do you find the exact coordinates of the runway threshold on Lido charts (I only see the stands coordinates..). Or do you have to work them out from the AGC chart scale on the side of the quadrant?

Thanks

[Capn Bloggs]

Build-your-own GPS Approaches, eh? :)

[777boeings]

Why on earth would anyone need them? I sincerely hope they're not for some half baked, home made approach. If this is the plan, please stick to Microsoft Flight Sim.

[waffler]

The Rwy coordinates are published on the descent profile section of the approach plates on certain airports only eg Heathrow with LIDO.
Very useful for RNAV approach checks.
A good question as it is not obvious.
Disregard the smart asses.

[Capn Bloggs]

Very useful for RNAV approach checks.
Getting a bit paranoid, aren't we, if we're checking the lats and longs of RNAV approach waypoints??

[777boeings]

Waffler
I don't think anyone is trying to be a smart ass.
The only checks you need to perform on an RNAV approach are altitudes and distances as published on the chart.
As an examiner I always suggest we keep things as simple as possible.
If you can give me one good reason why anyone would need the threshold coordinates, I'm all ears.

[FlightDetent]

Coordinates
Numeric value is not a part of LIDO charting standard, only the side-scale is there to help you in case you need them. Jeppesen does the same, IIRC.

EGLL
I suppose LIDO show them on the IAC because so does the UK AIP (http://www.ead.eurocontrol.int/eadbasic/pamslight-A0B73CF16DBDB2CCD9E02625236C79CC/7FE5QZZF3FXUS/EN/Charts/AD/AIRAC/EG_AD_2_EGLL_8-4_en_2013-09-19.pdf).

Use case
When operating to an airport which is not covered by your FMS database, it may be very helpful to create a destination runway at times. :ok:

Achieved precision
The accuracy of FMS manual entries is limited by the input format to one-tenth of a minute. I.e. N 51 28.7 - W000 29.1. Wheter you read from a scale on AGC, or read the AIP values you still get an error, no matter how accurate your data source is. You simply cannot enter N 51 28.650 W000 29.101.

[TCAS FAN]

If you check the Aerodromes Section of the AIP (AD 2.12) you will find the threshold coordinates for each runway.

[FlightDetent]

magenta: allowed FMS entries
green: AIP true position
blue: AIP IAC coordinates
red: pilot's best read-out

http://i.imgur.com/hBCRCfe.png

[SOPS]

I can't see why it matters...what am I missing?

I used to fly aircraft that had no computing power, we still managed to land.

[Jakib]

Hi! I’m using thresholds in an app. Did you ever get you find your coords source?