the branch of archaeology that deals with the recovery of ancient objects found beneath the sea, as shipwrecks or remains from submerged islands, and with the techniques of underwater exploration, excavation, and retrieval.
noun 1. a period from noon of one day to noon of the next, used in reckoning time aboard ship.
[naw-ti-kuh l, not-i-] /ˈnɔ tɪ kəl, ˈnɒt ɪ-/ adjective 1. of or relating to sailors, ships, or navigation: nautical terms. /ˈnɔːtɪkəl/ adjective 1. of, relating to, or involving ships, navigation, or sailors adj. 1550s, from -al (1) + nautic from Middle French nautique, from Latin nauticus “pertaining to ships or sailors,” from Greek nautikos “seafaring, […]
noun 1. a unit of distance used chiefly in navigation, equal to 6080.20 feet (1853.25 meters) in the U.S., now replaced by the international nautical mile. noun 1. Also called international nautical mile, air mile. a unit of length, used esp in navigation, equivalent to the average length of a minute of latitude, and corresponding […]
- Nautical twilight
noun the period after civil twilight until the time when the center of the refracted Sun is more than 12 degrees below the horizon Examples Nautical twilight is when the brighter stars used for celestial navigation have appeared and the horizon may still be seen.