|1.1508 miles or 1.852 kilometers
|Based on the circumference of the earth, used in maritime contexts.
|1.1508 mph or 1.852 kph
|Speed equal to one nautical mile per hour.
|6 feet or 1.8288 meters
|Unit of depth in the Imperial system
|Approx. 3.452 miles or 5.556 km
|Used to define the distance a person or a horse could walk in an hour.
|0.1 nautical mile or 185.2 meters
|Particularly in naval usage to define the distance between ships at sea.
|Astronomical Unit (AU)
|Approx. 93 million miles or 150 million kilometers
|The average distance from Earth to the Sun.
|5.879 trillion miles or 9.461 trillion kilometers
|The distance that light travels in a vacuum in one year.
|3.26 light years or 19.2 trillion miles
|The distance at which one astronomical unit subtends an angle of one arcsecond.
|11.18 million miles or 18 million kilometers
|The distance that light travels in a vacuum in one minute.
|186,282 miles or 299,792 kilometers
|The distance that light travels in a vacuum in one second.