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Melb3049 created the topic: RSWT Chart
Had a question regarding the variation from ISA at FL 340 of the temperature on a route between A & B.
The temperature showed 52. This was the temperature that the key off to the side for showed is the ISA for FL340. However, they also stated to "Assume a standard 2 degrees Celcius lapse rate."
I wasn't sure if that was just a red herring.
Anyway, I'm thinking that there is no difference between what temp is standard at FL340 and what the route at that level is showing. I'm expecting "Nil" to be one of the options.
The options were:
A. -1 C
B. +9 C
C. +1 C
D. -9 C
Doing some math it seems that if you do 34 x 2 = 68. Then subtract that from 15c, then it would be
= minus 53
They had the options as I previously posted. The temp on the route for FL340 was 52. Therefore I guess +1 was the correct answer.