#1 - 1. To find ground speed note the time required to fly a published distance.
2. Pick a number that when multiplied by the flight time yields approximately
3. To get that ground speed, multiply that number by the distance.
example: 15 minutes is required to fly 30 nm (4*15=60). Ground speed equals
120 kts (4*30=120)
#2 - For relatively fast aircraft (at least 250 kts), the quickest way
of calculating Ground Speed using the DME (without G/S readout) is to note
the distance travelled in 36 seconds. 36 seconds = 1% of one hour.
example: If you travel 3.25 nm your Ground Speed is 325 kts