Aviation – learning

By telleropnul, January 6, 2023

The knot is a unit of speed equal to one nautical mile (= 1.852 km) per hour, exactly 1.852 km/h (approximately 1.151 mph).  multiply knots by two to get rough indication of km/h equivalent.

One foot is 30cm.  three and a bit feet in a meter.  9000 feet altitude is 3/10th or roughly 1/3th in meters, so about 3000m or 3km (2.74km to be precise).  So 1/3th to get rough altitude in meters equivalent.