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 ...

A galleon and a tanker ship in a river - iwciagr/Shutterstock Imagine living sometime around the early 1600s. You're standing on the deck of a wooden ship. The wind's biting, the sky's endless. And ...

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 ...