Nautical mile

Nautical mile
Unit systemNon-SI unit
Unit ofLength
SymbolM, NM, or nmi 
Conversions
1 M, NM, or nmi in ...... is equal to ...
   metre   1852[1]
   foot   ≈6076.12
   statute mile   ≈1.15078
   cable   10
Historical definition – 1 nautical mile
Visual comparison of a kilometre, statute mile, and nautical mile

A nautical mile (also known as an air mile) is a unit of measurement defined as exactly 1,852 metres (6,076.12 ft; 1.15078 mi).

Historically, it was defined as one minute of latitude, which is one sixtieth of a degree of latitude – i.e. the polar circumference of 40,075.017 km x 1/60 x 1/360 = 1,855.3 metres (6,087 ft); this is known as the geographical mile.

It is a non-SI unit[1] which today has a continued use in both air and marine navigation,[2] and for the definition of territorial waters.[3]

One tenth of a nautical mile is a cable length.[4] The derived unit of speed is the knot, defined as one nautical mile per hour.

Unit symbol

There is no single internationally agreed symbol.[1]

While using M itself, the International Bureau of Weights and Measures recognises that NM, Nm and nmi are also in use.[1]

Other Languages
Afrikaans: Seemyl
العربية: ميل بحري
asturianu: Milla náutica
azərbaycanca: Dəniz mili
беларуская: Марская міля
беларуская (тарашкевіца)‎: Марская міля
български: Морска миля
Boarisch: Seemein
བོད་ཡིག: མཚོ་ལེ།
bosanski: Nautička milja
català: Milla marina
čeština: Námořní míle
Deutsch: Seemeile
eesti: Meremiil
español: Milla náutica
Esperanto: Marmejlo
euskara: Itsas milia
føroyskt: Sjómíl
français: Mille marin
Frysk: Seemyl
客家語/Hak-kâ-ngî: Hói-lî
한국어: 해리 (단위)
hrvatski: Nautička milja
Bahasa Indonesia: Mil laut
íslenska: Sjómíla
italiano: Miglio nautico
עברית: מיל ימי
ქართული: საზღვაო მილი
қазақша: Теңіз милясы
latviešu: Jūras jūdze
lietuvių: Jūrmylė
македонски: Наутичка милја
Bahasa Melayu: Batu nautika
Nederlands: Zeemijl
日本語: 海里
Nordfriisk: Siamiil
norsk nynorsk: Nautisk mil
occitan: Mila marina
oʻzbekcha/ўзбекча: Dengiz milyasi
پنجابی: سمندری میل
polski: Mila morska
português: Milha náutica
română: Milă marină
русский: Морская миля
sicilianu: Migghiu nauticu
slovenčina: Námorná míľa
slovenščina: Morska milja
Soomaaliga: Mayl-badeed
српски / srpski: Наутичка миља
srpskohrvatski / српскохрватски: Nautička milja
svenska: Nautisk mil
தமிழ்: கடல் மைல்
Türkçe: Deniz mili
українська: Морська миля
اردو: بحری میل
Tiếng Việt: Hải lý
Võro: Meremiil
Winaray: Milya nautica
粵語: 海哩
中文: 海里