Before ATSB or CASA start making public statements about mid air's they need to update their data so a cost benefit analysis can be sensibly made about electronic collission avoidance devices. Especially listening to the rantings of those who would have it mandated so the few can feel warm and cuddly without having to look out the window.
The last stat's are current to 2003.
http://www.atsb.gov.au/publications/...midair_col.pdf
They show 37 collisions over a 42 year period.(1.135 per year). 41% in controlled airspace. (were all these VCA's?)
There were 37 midair collisions involving general aviation aircraft in Australia
during the period 1961 to 2003. Since 1968, there was approximately one
midair collision per year in Australia. Most (34) of the midair collisions were
accidents, and a majority (19) of these accidents resulted in fatalities.
• There were no midair collisions involving regular public transport (RPT)
operations in Australia from 1961 to 2003.
• Midair collisions account for about 3 per cent of fatal accidents involving
general aviation aircraft, and 0.4 of a percentage point of all accidents involving general aviation aircraft.
• Most (78 per cent) of the midair collisions that have occurred in Australia since 1961 have occurred in or near the circuit area. This reflects the higher traffic density in this area. A high proportion of the collisions (35 per cent) occurred on final approach or the base-to-final turn.
• A high proportion of the midair collisions (41 per cent) have occurred at the five major general aviation airports (Archerfield, Bankstown, Jandakot, Moorabbin, Parafield). However, the rate of collisions at these airports has decreased since the introduction of General Aviation Aerodrome Procedures in 1980.
• A range of contributing factors were involved in the midair collisions, but there were no dominant factors. Most of the collisions involved one aircraft colliding with another from behind, or both aircraft converging from a similar direction.
• In general, the characteristics and contributing factors of midair collisions in
Australia appear to be similar to those observed in other countries such as the US, France and Canada.
• Australia and the US had a similar rate of midair collisions involving general
aviation aircraft during the period 1981-2003. The US had a higher rate of
general aviation aircraft involved in collisions per flight hour away from the
circuit area, which is consistent with the US having more general aviation flying activity and a higher traffic density.
Table 1: Number of midair collisions in Australia between different types of aircraft between 1961 and 2003 (fatal accidents, non-fatal accidents, and incidents in brackets)
Aircraft types 1961-70 1971-80 1981-90 1991-03 Total
General aviation
Aeroplane-aeroplane 3 (0,3,0) 11 (3,7,1) 7 (4,2,1) 7 (4,2,1) 28 (11,14,3)
Aeroplane-helicopter 1 (1,0,0) 0 0 0 1 (1,0,0)
Aeroplane-ultralight 0 0 0 1 (0,1,0) 1 (0,1,0)
Aeroplane-glider 0 1 (1,0,0) 2 (2,0,0) 4 (4,0,0) 7 (7,0,0)
Total 4 (1,3,0) 12 (4,7,1) 9 (6,2,1) 12 (8,3,1) 37 (19,15,3)
Sports aviation
Glider – glider 1 (1,0,0) 4 (1,2,1) 12 (2,7,3) 5 (3,1,1) 22 (7,10,5)
Balloon – balloon 0 0 2 (1,0,1) 2 (0,0,2) 4 (1,0,3)
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