Question 1

How many feet are in a nautical mile?

Accepted Answer

One nautical mile equals 6,076 feet, which is also 1.852 kilometres or 1.151 statute miles. The nautical mile is defined as one minute of arc along a meridian, which is why it dominates aviation and maritime navigation.

Question 2

What units does EASA use for altitude?

Accepted Answer

EASA publications and ICAO standards use feet for altitudes and flight levels. Some European states publish charts with metres alongside feet for reference, but the altimeter, ATC clearances, and flight plans are always in feet unless specifically operating in a metric-only airspace.

Question 3

How do I convert wind speed from knots to km/h?

Accepted Answer

Multiply knots by 1.852 to get km/h. A 20-kt wind is 37 km/h. To go the other way, divide km/h by 1.852. Knots remain the aviation standard because one knot equals one nautical mile per hour — which aligns with latitude-based navigation.

Question 4

What is QNH in hPa and inHg?

Accepted Answer

QNH is the altimeter setting that makes your altimeter read field elevation when on the ground. The ISA standard value is 1013.25 hPa, which equals 29.92 inHg. Europe primarily uses hPa; the US uses inHg. Conversion: hPa × 0.02953 = inHg.

Μετατροπέας Μονάδων

Aviation mixes metric and imperial in ways that catch pilots off guard.

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Which aviation units do you need to know for your PPL?

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