> Aviation also measure speed in knots, and distances in nautical miles. But those don't have good reasons to be kept. 1 knot is equal to 1 nautical mile/hour,

> Aviation also measure speed in knots, and distances in nautical miles. But those don't have good reasons to be kept. 1 knot is equal to 1 nautical mile/hour, which is traditionally 1 minute of latitude. I assume they have been kept for tradition and also in the event of an emergency requiring manual navigation?