Nautical

Nautical (pronounced naw-ti-kuhl)

(1) Of or relating to ships, navigation, sailors & other admiralty matters.

(2) As nautical mile, a measure of distance.

1545-1555: From the Middle French nautique (pertaining to ships, sailors, or navigation) from the Latin nautic(us) (of or relating to ships or sailors), from the Ancient Greek ναυτικός (nautikós) (seafaring, naval), from nautes (sailor), from naus (ship), from the primitive Indo-European nau (boat).  Nautical is the adjective, nauticality the noun and nautically the adverb; associated words include navigational, seafaring, maritime, marine, aquatic, naval, oceanic, pelagic, salty, ship, abyssal, thalassic, boating, deep-sea, navigating, oceangoing, oceanographic, rowing, sailing & seagoing.

The nautical mile

A unit of distance measurement used in maritime, air and space navigation, one nautical mile was defined originally as one minute (one sixtieth of a degree) of latitude along any line of longitude.  It’s since been re-defined several times and although the international nautical mile is set at 1852 metres (about 1.15 miles), other definitions co-exist: a US Navy nautical mile being 1853.2480 metres (6080.2 feet) whereas UK Admiralty charts use an even 6080 feet.  No standardized nautical mile symbol has ever been agreed with M, NM, nmi and nm variously used.

The derived unit of speed is the knot, a vessel at one knot along a meridian travels approximately one minute of geographic latitude in one hour.  The word knot was originally an admiralty term to measure speed, derived from counting the number of knots unspooled from a real of rope in a certain time.  Curiously, although kn is the ISO standard symbol for the knot, kt is also widely used, particularly in civil aviation.

The reason the generally accepted definition of national territorial waters was set at three nautical miles (5.6 km) was wholly military; it was maximum range of the big ordnance of the age, the cannon-ball.  Developments in ballistics and politics soon rendered the three mile limit irrelevant and states began to claim larger areas but, although the League of Nations Codification Conference began discussions in 1930, nothing was resolved either then or at the subsequent United Nations Conferences on the Law of the Sea (UNCLOS I 1956-1958 & UNCLOS II 1960).  It took a ten-year process (UNCLOS 1973-1982) to secure international agreement that the national territorial limit was set at twelve nautical miles, the provision coming into force in 1994.

Lindsay Lohan's nautically themed Vanity Fair photo shoot, Marina del Rey, California, October 2010.  The location was the Sovereign, a motor yacht built in 1961 for the film star Judy Garland (1922-1969).