[MrPeaBody]

Interesting that there is apparently no guidance in relation to buildings on airports. I just had to take look at the CASR Part 139 MOS; and low behold there is guidance on runways and obstacle free zones. The CASA chaps must have forgot there was a MOS.

By my reading Essendon Airport falls into the class 3 bucket (refer table 6.2.7). An air strip such as those found at Essendon are comprised of the runway, a graded area and a fly over area. By my reading a class 3 air strip should be 300m wide (150m either side of the runway centre line).

The strip is part of the obstacle free zone. To my eye Dan Murphy's, RSEA and a big swag of DFO (and its fences) are in the obstacle free zone.

But I guess buildings aren't classed as obstacles.