10540
That is the whole point with long distance flying which knowing about you you have to an art to.
But with this new EIR we are not talking about pilots with experience like yours.
Summertime and you can still be in freezing levels at 10 to 12K. Trundling up and down to the S of France at FL380 or FL390 in the Citation I fly gives a good picture of weather below and it is rare to NOT have fronts of one kind or another for part of the route.
Pilots using the EIR on long distance flying (which will be its main use) Will have to be extra vigilant and selective of when they go especially the Newbie guys and especially in non turbo, non deice/anti ice low powered piston singles.
VFR MAY be the better option? At least you can do a 180 and land somewhere back from whence you came.
They wont all have guardian angels like I have had in my past.
Pace