Brett Davis
Ok,have to admit-it is a bit confusing at first but,let's try to simplify it:
-up to FL 290 apply 1000 ft for opposite direction traffic.So eastbound level is 250,westbound 260,e-bound 270,w-bound 280,e-bound 290.
Ok..now we have two possibilities for higher altitudes-RVSM scheme and NON RVSM scheme.
*RVSM scheme:
the same pattern is applied up to FL 410 which is the last eastbound RVSM level,next level is NON RVSM westbound level ,and now 2000 ft vertical separation must be applied.So ,next westbound level is 430,e-bound 450,w-bound 470,e-bound 490...etc
*NON RVSM scheme
above 290 you must apply 2000' for opposite direction traffic.Next westbound level is 310,e-bound 330,..etc
So eastbound levels are : 330,370,410,450,490..
and westbound levels are : 310,350,390,430,470,510...etc
cheers