Nautical mile

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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
This article is about distance measurement at sea. For distance measurement on land, see mile. For the US unit based on the equator, see geographical 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
বাংলা: নটিক্যাল মাইল
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
dansk: International sømil
Deutsch: Seemeile
eesti: Meremiil
español: Milla náutica
Esperanto: Marmejlo
euskara: Itsas milia
فارسی: مایل دریایی
føroyskt: Sjómíl
français: Mille marin
Frysk: Seemyl
galego: Milla náutica
客家語/Hak-kâ-ngî: Hói-lî
한국어: 해리 (단위)
हिन्दी: समुद्री मील
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
magyar: Tengeri mérföld
македонски: Наутичка милја
മലയാളം: നോട്ടിക്കൽ മൈൽ
Bahasa Melayu: Batu nautika
Nederlands: Zeemijl
日本語: 海里
Nordfriisk: Siamiil
norsk: Nautisk mil
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
Scots: Nautical mile
sicilianu: Migghiu nauticu
سنڌي: ناٽيڪل ميل
slovenčina: Námorná míľa
slovenščina: Morska milja
Soomaaliga: Mayl-badeed
српски / srpski: Наутичка миља
srpskohrvatski / српскохрватски: Nautička milja
suomi: Meripeninkulma
svenska: Nautisk mil
தமிழ்: கடல் மைல்
ไทย: ไมล์ทะเล
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