Originally Posted by
Seaeagle109
... It was explained to me by someone, either Airservices or DOT/ CASA years ago, that the reason that the runway designation doesn't always match the magnetic heading on 02/20 & 13/31 runways was so that there couldn't be confusion.
Re: 02/20 are there any as I can't recall any at a licensed airport. Then again as I haven't been to every airport or strip in Oz, there's quite likely to be.
The November 2018 ERSA has
10x 02/20 runways (3 registered, Leigh Creek, Narracoote & Tibbooburra) and
20x 13/31 runways (13 registered, eg Ayers Rock, Warnambool, ...)