Here on land, the speed of a vehicle is recorded in either miles per hour or kilometers per hour. In either case, determining how fast you're moving on land is fairly simple because you can see ...

The laws of distance, and hence speed, are slightly different on the ocean than on land. Mariners also use their own vocabulary when measuring the two. To begin, a mile on the ocean — called a ...

How fast you’re going while out floating on the big blue can be notoriously tricky to judge if you’re just eyeballing it. One method used to get around this issue was introduced in the sixteenth ...

Mariners used to toss a wooden log overboard, and while its line spooled out, they would count each of the knots that passed through their hands. After 28 seconds, they recorded their boat’s speed in ...

Eurocopter has announced a new pair of speed records set by its hybrid helicopter demonstrator, the X3. Piloted by Hervé Jammayrac, the X3 reached a level flight speed of 255 knots (472 km/h) over the ...

Sikorsky Aircraft’s coaxial X2 Technology demonstrator has achieved the 250-knot (287.69 mph) milestone that was established as the goal of the craft from its inception. The speed, which was achieved ...