It's totally irrelevant what the CAA or H-C matrices show. The Duty Holders are working to MAA regs, like them or not. CATASTROPHIC/REMOTE in the RA1210 matrix is a 'HIGH' risk which can be held by an ODH. The MAA's tolerability table in RA1210 makes reference only to annual probability of death; it's got nothing to do with individual incident outcomes
What a pity you feel that way about H-C (BP 1201) and the CAA, it seems that the MAA is out of step with acceptable approaches. It is important that when we use common terminology we apply common meaning. The RAF shares, at times, common airspace with the CAA, so when a collision risk is declared Tolerable and ALARP it should mean the same to both organisations. Once again death is not the risk we are mitigating (risk register indicates Mid-Air Collision - MAC), it is the consequence of a collision, which in turn is a consequence of "
an aircraft being in close proximity of another aircraft that their safety is or may be compromised". TCAS (or the bespoke system) prevents the latter. An OR (Air) 1998 submission, which MoD hides, specifies the requirement as being "
To automatically detect aircraft whose relative position and course pose a risk of mid-air collision and to warn the crew so that avoiding action can be taken". It does not say "To keep the death rate better than 1 in 1000 per year.
As for ALARP, do you seriously consider it 'reasonable' to ground a combat aircraft for lack of a CWS only 2 years after funding was approved? It's almost impossible to get new kit into service any quicker. Perhaps you would like DE&S to cut some corners?
The simple answer to that is "No", but I do expect the MAA and DHs to apply the same restrictions as they were prepared to apply back in 2011, when the risk was declared Not Tolerable, and Not ALARP. And with regards to "cutting corners", well, it has only taken 23 years and it's still not fitted.
May I remind you that the Nimrod force was scapped because fuel couplings and hot air pipes could not be replaced effectively. That was after one fuel fire in 30 years.
DV