When you're driving on land, speed is measured in either miles per hour (mph) or kilometers per hour (km/h). These measurements are straightforward because you can see stationary landmarks and ...

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 ...

Q: On land we measure wind speed in miles per hour. On sea we measure it in knots. Why the difference? Driving them batty: My recent trivia question about the fastest flying creature on Earth prompted ...