I have not been following this tread, and at the risk of duplicating information.
Aerodrome reference points are clearly marked on DAP Aerodrome Charts. Also available are the runway threshold elevations. Referring to Narromine (one that a lot of you know) you will see the airfield elevation is 782ft - while the thresholds of Rwy 11 is 776 ft, Rwy 29 782 ft Rwy 04 780 ft, and Rwy 22 781 ft. There goes the flat earth theory. DAP charts are available off the AirServices web site. SDF -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kittel, Stephen W (ETSA) Sent: Tuesday, 13 January 2004 4:34 PM To: 'Discussion of issues relating to Soaring in Australia.' Subject: RE: [Aus-soaring] Elevation data for Australian Turnpoints Just before the thread dies I thought I'd jump in. I always thought the position and heights given in ERSA were based on the "main wind indicator" and wasn't aware of the aerodrome reference point. Out of interest I actually RTFM! (intro-6 and onwards) and this is what appears to be indisputable: There is an aerodrome reference point on some diagrams. The elevation given is for the highest point of the landing area. Geographic location is given in degrees, minutes and tenth of minutes. So although it would be logical to think the location and elevation are at the same place and this is usually the reference point, nothing actually confirms it (elevation related might explain why the reference points are splattered around without any obvious reason). Regards SWK > -----Original Message----- > From: Jason Armistead [mailto:[EMAIL PROTECTED] > I noticed that not all airfields in ERSA have a reference > point symbol shown, > e.g. Colac, Cunderin. Some are unlicensed, some are > licensed, some have > single runways, some have multiple runways. There doesn't Some have lighting some do not. Some have landing aids some do not. > seem to be a > pattern that determines whether that point is shown. I'm not > sure what the > assumption is if it isn't shown - is it the intersection of > two runways, or > perhaps the middle of a single-runway airfield, or what ? > > In any case, the points that are used as reference points > might not be the > same as the ones accepted as turnpoints, some of which are, > for example, > terminal buildings, or simply runway intersections. > _______________________________________________ Aus-soaring mailing list [EMAIL PROTECTED] http://lists.internode.on.net/mailman/listinfo/aus-soaring _______________________________________________ Aus-soaring mailing list [EMAIL PROTECTED] http://lists.internode.on.net/mailman/listinfo/aus-soaring
