Are Upper Winds (FD's) Listed in pressure altitude?

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TopGun1234
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Are Upper Winds (FD's) Listed in pressure altitude?

#1 Post by TopGun1234 » Thu Feb 15, 2018 9:29 pm

I know they are listed ASL but when I'm calculating a heading using FD's, I'm currently interpolating to my pressure cruising altitude. Is this wrong?
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ahramin
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Re: Are Upper Winds (FD's) Listed in pressure altitude?

#2 Post by ahramin » Thu Feb 15, 2018 10:12 pm

FDs are true altitude.
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TopGun1234
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Re: Are Upper Winds (FD's) Listed in pressure altitude?

#3 Post by TopGun1234 » Fri Feb 16, 2018 12:38 am

So what i should be doing is interpolating what the FD winds are at my cruising indicated altitude?
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PostmasterGeneral
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Re: Are Upper Winds (FD's) Listed in pressure altitude?

#4 Post by PostmasterGeneral » Fri Feb 16, 2018 6:39 am

Don’t overthink it.
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geneticistx
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Re: Are Upper Winds (FD's) Listed in pressure altitude?

#5 Post by geneticistx » Fri Feb 16, 2018 8:36 pm

FTM
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