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3 votes
2 answers
500 views

Is there an explanation for the measurement system used in aviation? [duplicate]

Why is speed measured in knots (as opposed to kmp/h or mp/h), and distances in nautical miles? Is there a reason for following such a system?
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0 votes
2 answers
289 views

What units are used by western airliners? [duplicate]

Many different units can be used to designate the same things. Degrees Celsius va Fahrenheit Altitude in feets or meters, ... Sometime different units measure the same thing but have different ...
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  • 4,123
33 votes
11 answers
11k views

How could "aggressor" pilots fly foreign aircraft without speaking the language?

Context I watched a couple documentaries recently and found one where they were mentioning the training of American forces against Mi-24 that were captured and brought back to the US to test fly them....
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28 votes
4 answers
13k views

Why doesn't the aviation industry use SI units?

This is a followup to What is the measurement system used in the aviation industry? and related to this question from History. I can understand the arguments as to why adoption of SI units would not ...
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  • 1,604
13 votes
3 answers
7k views

Does European airspace use the metric system?

I figured this was probably a no brainer, since Europe uses the metric system, I assume the airspace does... But then I remembered that aviation likes international standards, and I know the US uses ...
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12 votes
4 answers
11k views

What is the meaning of "altimeter three-zero-one-one"?

I've been listening to a lot of liveatc.net recently (mostly at CYVR). What does it mean when the ATC give an "altimeter" reading (usually around the 3000 area). Altimeter three-zero-one-one. I'm ...
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  • 223
15 votes
2 answers
5k views

When ATC uses distances, are they using nautical miles or statute miles?

"Skyhawk 872ND, airport at your 12 o'clock in 15 miles." "Baron 981K, traffic, 2 o'clock 5 miles, opposite direction, a Piper southbound, 1000 feet below you." Does ATC use nautical miles or statute ...
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  • 4,153
1 vote
2 answers
5k views

What is the difference between a nautical mile and a statute mile? And what is a knot?

What is the difference between a "nautical mile" and a "statute mile?" And what is a "knot?"
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  • 8,150
8 votes
1 answer
3k views

Are there differences in tool standards between aircraft manufacturers?

As a follow up to "What is the measurement system used in the aviation industry?" which specified about measurement units during operations, another question that comes to my mind is: are there ...
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1 vote
4 answers
2k views

What is the official unit of airplane/aviation speed?

Some units I read/found are commonly used in aviation: mach, knot (nautical mile per hour), mile per hour (mph), kilometer per hour (km/h or kph). "Official" meaning like the units used by the flight ...
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5 votes
1 answer
730 views

What is the distance unit on a navigation display?

I want to learn what is the distance unit on a navigation display. I pointed the distance marks with red circles on the navigation display. What are these 10, 15 etc. values' unit? Are they ...
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  • 283
3 votes
2 answers
539 views

Why do Western aircraft manufacturers use FPS system while Russian aircraft manufacturers use MKS system for flight instruments?

Why is there a variation in aircraft flight instruments of aircraft from Western & Russian origin? Foot–pound–second system (FPS) Meter-kilogram-second (MKS)
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