The search location is well out of ADS-B range. We have great coverage in Perth but this won't extend out to the Ocean. It is possible that some of those military aircraft are making themselves visible when they can choose not to.I wonder if the military planes are using civilian modes to make themselves visible to the non-military flights in the area. I guess the search area is a bit too far out to get direct ADS-B reception!
Well I did manage to snag one returning flight from the search area just now:The search location is well out of ADS-B range. We have great coverage in Perth but this won't extend out to the Ocean. It is possible that some of those military aircraft are making themselves visible when they can choose not to.