You hear that guys !

1 nm is 6076 POINT ! 12 feet.

So if I'm flying at 3000 foot altitude how much is that in nautical miles. NO calculators please. Also why is horizontal speed measured in nm and vertical speed measured in ft/sec. When flying to the moon; do you measured that in feet/sec, nm/h or normal miles / hour ; afterall it vertical speed from the beginning and not over land or sea later on ? Or even the distance between city A and B is 1000 normal miles; how long does it take an airplane travelling at 600 knots take to cover the distance in a straight line. Or this one. A biplane has a speed over land of 80 knots and has a vertical speed of 20 feet per second. How much is his resulting airspeed ? If his wings break of at 150 ft/sec airspeed will this plane survive his dive ?

Say a ship is 300 ft long and travelling at 10 knots; how long does it take to pass the harbour entrance bouy from bow to stern ?

Now think about doing all these calcs in the SI system where only meters and Meters/sec are allowed to be used. Wow, you could do all these calculation right from your head within seconds ! But the French invented it so there MUST be SOMETHING wrong with it.

Wouter