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 ...

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 ...

Three seconds before it struck the ground Saturday, the speed of Asiana Airlines Flight 214, a Boeing 777, was 103 knots — the lowest measured by its data recorders, and far below the target speed of ...

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 ...