Ask a guy sitting in his emt refresher course anything
- Thread starter hibiti87
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Was gonna say, that's 4th grade math
I seen people getting confused on how to do this. Sometimes something very easy can seem very hard.
JPINFV
Gadfly
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Airplanes measure all altitude by changes in air pressure when compared to sea level, and then can calculate out altitude above ground level (which is important for, say, landing). So a plane with an altimeter reading of 36k feet is 36k feet above sea level, even if the ground underneath the plane goes up to 7k feet. So over the ocean, a plane has to go the full 36k feet, however above a mountain with a height of 7k feet, the plane only has to go 29k feet before hitting.
At least we didn't have to get into ground speed vs air speed as vertical speed is vertical speed.
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That is main reason why I said sea level and didn't give speed. Still good explanation for those that do not know.