The DGCA is updating airport elevations using survey-grade GPS units. Pilots arriving at Wamena with an altimeter setting from a low-elevation airport (Sentani, Timika, Nabire, Merauke) will notice a significant difference in elevation (altimeter will show closer to 5100’ at Wamena). This is mainly due to the errors associated with a pressure altimeter in higher-than-standard temperatures. For more information about this indicated vs true altitude error, see FAA AC 00-6B 5.4.1 “Altitude”, John S Denker “How It Flies” 20.2.4 < https://www.av8n.com/how/htm/atmo.html#sec-h-a-l-t> and Mike Borgelt’s article at http://www.borgeltinstruments.com/?page_id=259
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Wamena Elevation - GPS vs Altimeter Set to Low Elevation Air
đź”— Tue, 19 Jan 2021
— @akajono at Wamena Airport, Indonesia Reply
The DGCA is updating airport elevations using survey-grade GPS units. Pilots arriving at Wamena with an altimeter setting from a low-elevation airport (Sentani, Timika, Nabire, Merauke) will notice a significant difference in elevation (altimeter will show closer to 5100’ at Wamena). This is mainly due to the errors associated with a pressure altimeter in higher-than-standard temperatures. For more information about this indicated vs true altitude error, see FAA AC 00-6B 5.4.1 “Altitude”, John S Denker “How It Flies” 20.2.4 < https://www.av8n.com/how/htm/atmo.html#sec-h-a-l-t> and Mike Borgelt’s article at http://www.borgeltinstruments.com/?page_id=259