Dangerous Ash?
To previous posters some answers:
We have wx radar to Detect and AVOID CBS
When significant bird concentrations are known about we DONT TAKE OFF
Flying is all about risk management.
The whole point of my post is that overnight someone has dreamt up a supposed safe level of volcanic ash concentration.
Where is the evidence to back that up and how do we as pilots determine the level that we are flying through is at or below that level.
Oh yeah and the only remedy we have in flight is a 180 turn
THAT IS BASED ON A FLIGHT PLAN THAT AVOIDS ASH
So having not been flight planned through and not encountering ash at any level of concentration up to that point a 180 turn is a sensible action to remove the risk.
Being flight planned THROUGH ash areas that maneuver may very well be useless