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Nautical mile

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suggested 349,800 feet to a degree (5830 feet per arcminute). Both Gunter and Oughtred put forward the notion of dividing a degree into 100 parts, but their proposal was generally ignored by navigators. The ratio of 60 miles, or 20 leagues, to a degree of latitude remained fixed while the length of
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with slightly flattened poles, a minute of latitude is not constant, but about 1,861 metres at the poles and 1,843 metres at the Equator. France and other metric countries state that in principle a nautical mile is an arcminute of a meridian at a latitude of 45°, but that is a modern justification
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as exactly 1,852 metres (which is 6,076.12 ft). The United States did not adopt the international nautical mile until 1954. Britain adopted it in 1970, but legal references to the obsolete unit are now converted to 1,853 metres (which is 6,079.40 ft).
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the "rule to raise a degree" practised by navigators: "But as I take it, we in England should allowe 60 myles to one degrée: that is, after 3 miles to one of our Englishe leagues, wherefore 20 of oure English leagues shoulde answere to one degrée." Likewise,
565:(also known as centesimal arc minute) of latitude. The Earth's circumference is therefore approximately 40,000 km. The equatorial circumference is slightly longer than the polar circumference – the measurement based on this ( 476:
the mile was revised with better estimates of the earth’s circumference. In 1637, Robert Norwood proposed a new measurement of 6120 feet for an arcminute of latitude, which was within 44 feet of the currently accepted value for a nautical mile.
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The nautical mile is in principle the length of the sexagesimal minute of a meridian at a latitude of 45°. ... If we assume that the metre is exactly the ten-millionth part of the terrestrial quarter meridian, it would be equal to 1,851.85
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of the Clarke 1866 ellipsoid is 6,370,997.2 metres (20,902,222 ft). The resulting arcminute is 1,853.2480 metres (6,080.210 ft). The United States chose five significant digits for its nautical mile, 6,080.2
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became the metric length for a nautical mile. France made it legal for the French Navy in 1906, and many metric countries voted to sanction it for international use at the 1929 International Hydrographic Conference.
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wrote in 1594 that the distance along a great circle was 60 miles per degree. However, these referred to the old English mile of 5000 feet and league of 15,000 feet, relying upon Ptolemy's underestimate of the
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is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees). Today the international nautical mile is defined as 1,852 metres (about 6,076 ft; 1.151 mi). The derived unit of speed is the
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International Standards and Recommended Practices, Annex 5 to the Convention on International Civil Aviation, “Units of measurement to be Used in Air and Ground Operations”, ICAO, Fifth Edition, July 2010.
447:. In the early seventeenth century, English geographers started to acknowledge the discrepancy between the angular measurement of a degree of latitude and the linear measurement of miles. In 1624 1624: 273:
is a non-standard abbreviation used in many maritime applications and texts, including U.S. Government Coast Pilots and Sailing Directions. It conflicts with the SI symbol for
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Both the United States and the United Kingdom used an average arcminute—specifically, a minute of arc of a great circle of a sphere having the same surface area as the
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of the length of the meridian arc from the North pole to the equator (1% of a centesimal degree of latitude), thus one kilometre of distance corresponds to one
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for a more mundane calculation that was developed a century earlier. By the mid-19th century, France had defined a nautical mile via the original 1791
1308: 823: 723: 240: 264: 1502: 976:(in French and English). Vol. 1D (INT1) (6th ed.). Service Hydrographique et OcĂ©anographique de la Marine (SHOM). 2016. Archived from 1006: 963: 1459: 1090: 1532: 1370: 1176: 1405: 1055:"Mile, Nautical and Statute – FREE Mile, Nautical and Statute information | Encyclopedia.com: Find Mile, Nautical and Statute research" 714: 998: 917: 421:
By the late 16th century English geographers and navigators knew that the ratio of distances at sea to degrees was constant along any
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to 60 miles to a degree is not explained. Eventually, the ratio of 60 miles to a degree appeared in English in a 1555 translation of
1584: 1038: 853: 770: 731: 687:, the measure of length equal to the ten-millionth part of a terrestrial meridian contained between the north pole and the equator." 683:
No meridian was specified in either 1791, 1793, 1795 or 1799 . For example, the Law of 18 Germinal an III (April 7, 1795) states: "
310:. Navigation at sea was done by eye until around 1500 when navigational instruments were developed and cartographers began using a 1062: 430: 651: 534:
In 1929 the international nautical mile was defined by the First International Extraordinary Hydrographic Conference in
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The Sea-man's Practice: Containing a Fundamental Problem in Navigation, Experimentally Verified
608:, a Martian nautical mile equals to 983 m (1,075 yd). This is potentially useful for 531:, whereas the United Kingdom chose four significant digits for its Admiralty mile, 6,080 feet. 1590: 1580: 1574: 1084: 1034: 1002: 849: 766: 727: 582: 334: 311: 35: 1524: 1362: 1170: 1397: 737: 633: 489: 472: 1219: 913: 520: 516: 480: 869: 30:
This article is about distance measurement at sea. For distance measurement on land, see
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A learned treatise of globes, both cƓlestiall and terrestriall with their several uses
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unul gradul log. et latitud sub equinortiali formet stadia 500 que fanut miliaria 62
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miles"). Whether a correction or convenience, the reason for the change from 62
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There is no single internationally agreed symbol, with several symbols in use.
623: 180: 17: 1594: 468: 327: 274: 353:". An earlier manuscript map by Nicolaus Germanus in a previous edition of 786: 616:, both as a shorthand and a quick way to roughly determine the location. 319: 212: 1556:
Outlines of the Evolution of Weights and Measures and the Metric System
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The Art of Navigation in England in Elizabethan and Early Stuart Times
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The Case for Mars: The Plan to Settle the Red Planet and Why We Must
418:'s Decades: " assigned likewise to every degree three score miles." 1495:"Nautical mile definition and meaning | Collins English Dictionary" 548: 378:" ("one degree longitude and latitude under the equator forms 500 285: 109: 670:
Alternative meanings of the abbreviation "nm" or "NM" are listed
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Symboles, Abréviations et Termes utilisés sur les cartes marines
605: 305: 291: 31: 429:, or any meridian), assuming that Earth was a sphere. In 1574, 347:
indicating one degree of longitude at the Equator contains "
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The earliest reference of 60 miles to a degree is a map by
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is used as the abbreviation for the nautical mile by the
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The Circles of Proportion and the Horizontall Instrument
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Symbols and Abbreviations used on ADMIRALTY Paper Charts
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Göbel, E.; Mills, I.M.; Wallard, Andrew, eds. (2006).
1579:. Richard Wagner. New York: Free Press. p. 162. 1432:, vol. 1, Macmillan and Co, Limited, p. 587 1625:
Customary units of measurement in the United States
1224:. London: J.S. for Andrew Kemb. pp. 157, 163. 153: 137: 121: 105: 83: 75: 65: 60: 43: 479:Since the Earth is not a perfect sphere but is an 1460:"Refinement of values for the yard and the pound" 816:"UNITED NATIONS CONVENTION ON THE LAW OF THE SEA" 251:Institute of Electrical and Electronics Engineers 970:Symbols, Abbreviations and Terms used on Charts 302:is from the Latin phrase for a thousand paces: 1469:. National Bureau of Standards. Archived from 1458:Astin, A.V.; Karo, H. Arnold (June 25, 1959). 1332:"RASC Calgary Centre - Latitude and Longitude" 939:"U.S. Government Printing Office Style Manual" 34:. For the U.S. unit based on the Equator, see 8: 1559:, New York The Macmillan company, p. 54 1144:The Decades of the Newe Worlde Or West India 1115:"Eleventh map of Asia," Ptolemy's Geographia 1553:Hallock, William; Wade, Herbert T. (1906), 1525:"The Units of Measurement Regulations 1995" 358: 348: 303: 1363:"Mesures employĂ©es sur les cartes marines" 255:United States Government Publishing Office 49: 40: 1196: 1194: 1147:. London: Guilielm. Powell. p. 323. 724:Bureau International des Poids et Mesures 241:International Civil Aviation Organization 1336:The Royal Astronomical Society of Canada 451:suggested 352,000 feet to a degree (5866 848:(first ed.). Osprey. p. 200. 765:(first ed.). Osprey. p. 200. 700: 663: 265:International Hydrographic Organization 55:Historical definition – 1 nautical mile 716:The International System of Units (SI) 708: 706: 704: 187:. Historically, it was defined as the 1505:from the original on 1 September 2019 1307:. London: Richard Mount. p. 43. 1175:. London: Thomas Hacket. p. 39. 7: 1311:from the original on 24 October 2023 1282:from the original on 24 October 2023 1228:from the original on 24 October 2023 1179:from the original on 23 October 2023 1141:Anghiera, Pietro Martire d' (1555). 1122:from the original on 23 October 2023 1093:from the original on 23 October 2023 1089:. Ulm: Lienhart Holle. p. 245. 1342:from the original on 30 August 2019 997:. Vol. NP5011 (6th ed.). 941:. U.S. Government Printing Office. 1615:Units of measurement in navigation 999:United Kingdom Hydrographic Office 914:"APPENDIX A: SYMBOLS AND PREFIXES" 581:= 1,855.3 metres) is known as the 290:Visual comparison of a kilometre, 25: 1445:Map Projections: A Working Manual 870:"WS SIGMET Quick Reference Guide" 87: 1023:Dutton's Navigation and Piloting 626: 1535:from the original on 2017-03-24 1408:from the original on 2019-08-31 1373:from the original on 2019-08-31 1151:from the original on 2023-10-24 1065:from the original on 2016-06-07 945:from the original on 2018-11-19 920:from the original on 2021-04-23 886:from the original on 2020-11-21 826:from the original on 2017-12-18 797:from the original on 2022-10-25 179:used in air, marine, and space 1396:Bureau des Longitudes (1848). 1361:Bureau des Longitudes (1933). 1112:Germanus, Nicolaus (c. 1460). 224:, one nautical mile per hour. 1: 1426:Blazebrook, Richard (1922), 1001:. 2016. section B, line 45. 787:"mile | unit of measurement" 652:Orders of magnitude (length) 191:length corresponding to one 183:, and for the definition of 1386:– Translation by Knowledge. 1250:The Works of Edmund Gunther 1083:Germanus, Nicolaus (1482). 614:human mission to the planet 604:of a degree of latitude on 217:Earth's polar circumference 1641: 1272:Oughtred, William (1639). 551:was originally defined as 29: 27:Unit of distance (1,852 m) 1301:Norwood, Richard (1699). 1201:Waters, David W. (1958). 488:, one ten-millionth of a 416:Pietro Martire d'Anghiera 101: 48: 1443:Snyder, John P. (1987). 1247:Gunther, Edmund (1673). 1169:Bourne, William (1574). 846:A Dictionary of Aviation 844:Wragg, David W. (1973). 763:A Dictionary of Aviation 761:Wragg, David W. (1973). 215:at the equator, so that 1429:A Dictionary of Physics 1402:Annuaire Pour l'An 1848 1367:Annuaire Pour l'An 1933 791:EncyclopĂŠdia Britannica 722:(8th ed.). Paris: 486:definition of the metre 1529:www.legislation.gov.uk 1172:A regiment for the sea 1086:Ptolemy's Cosmographia 642:Nautical measured mile 509:= 1,851.85 m ≈ 1,852 m 435:A Regiment for the Sea 359: 349: 304: 295: 1398:"Mesures itinĂ©raires" 1218:Hues, Robert (1659). 1031:Naval Institute Press 588:Using the definition 517:Clarke 1866 ellipsoid 445:Earth's circumference 337:in a 1482 edition of 289: 89:1 M, NM, or nmi 1059:www.encyclopedia.com 610:celestial navigation 647:Conversion of units 543:Similar definitions 524:(equal area) radius 96:... is equal to ... 61:General information 1499:Collins Dictionary 992:also available as 296: 185:territorial waters 163:    155:    147:    139:    133:≈ 6,076.11549 131:    123:    115:    107:    1025:(14th ed.). 1008:978-0-70-774-1741 583:geographical mile 335:Nicolaus Germanus 312:coordinate system 294:and nautical mile 169: 168: 84:Conversions 36:geographical mile 16:(Redirected from 1632: 1599: 1598: 1567: 1561: 1560: 1550: 1544: 1543: 1541: 1540: 1521: 1515: 1514: 1512: 1510: 1491: 1485: 1484: 1482: 1481: 1476:on March 9, 2013 1475: 1464: 1455: 1449: 1448: 1440: 1434: 1433: 1423: 1417: 1416: 1414: 1413: 1393: 1387: 1385: 1379: 1378: 1358: 1352: 1351: 1349: 1347: 1327: 1321: 1320: 1318: 1316: 1298: 1292: 1291: 1289: 1287: 1269: 1263: 1262: 1260: 1258: 1244: 1238: 1237: 1235: 1233: 1215: 1209: 1208: 1198: 1189: 1188: 1186: 1184: 1166: 1160: 1159: 1157: 1156: 1138: 1132: 1131: 1129: 1127: 1109: 1103: 1102: 1100: 1098: 1080: 1074: 1073: 1071: 1070: 1051: 1045: 1044: 1019: 1013: 1012: 991: 989: 988: 982: 975: 960: 954: 953: 951: 950: 935: 929: 928: 926: 925: 910: 904: 901: 895: 894: 892: 891: 885: 874: 866: 860: 859: 841: 835: 834: 832: 831: 812: 806: 805: 803: 802: 783: 777: 776: 758: 752: 751: 749: 748: 742: 736:. Archived from 721: 710: 688: 681: 675: 668: 636: 634:Geography portal 631: 630: 629: 603: 601: 600: 597: 594: 580: 578: 577: 574: 571: 560: 559: 555: 510: 508: 506: 505: 502: 499: 490:quarter meridian 473:William Oughtred 466: 464: 463: 460: 457: 413: 411: 410: 407: 404: 397: 395: 394: 391: 388: 377: 375: 373: 372: 369: 366: 352: 309: 211:of a degree) of 210: 208: 207: 204: 201: 164: 156: 148: 140: 132: 124: 116: 108: 53: 41: 21: 1640: 1639: 1635: 1634: 1633: 1631: 1630: 1629: 1620:Units of length 1605: 1604: 1603: 1602: 1587: 1569: 1568: 1564: 1552: 1551: 1547: 1538: 1536: 1523: 1522: 1518: 1508: 1506: 1493: 1492: 1488: 1479: 1477: 1473: 1462: 1457: 1456: 1452: 1442: 1441: 1437: 1425: 1424: 1420: 1411: 1409: 1395: 1394: 1390: 1376: 1374: 1360: 1359: 1355: 1345: 1343: 1330:McNish, Larry. 1329: 1328: 1324: 1314: 1312: 1300: 1299: 1295: 1285: 1283: 1271: 1270: 1266: 1256: 1254: 1246: 1245: 1241: 1231: 1229: 1217: 1216: 1212: 1200: 1199: 1192: 1182: 1180: 1168: 1167: 1163: 1154: 1152: 1140: 1139: 1135: 1125: 1123: 1111: 1110: 1106: 1096: 1094: 1082: 1081: 1077: 1068: 1066: 1053: 1052: 1048: 1041: 1021: 1020: 1016: 1009: 993: 986: 984: 980: 973: 962: 961: 957: 948: 946: 937: 936: 932: 923: 921: 912: 911: 907: 902: 898: 889: 887: 883: 872: 868: 867: 863: 856: 843: 842: 838: 829: 827: 814: 813: 809: 800: 798: 785: 784: 780: 773: 760: 759: 755: 746: 744: 740: 734: 726:. p. 127. 719: 712: 711: 702: 697: 692: 691: 682: 678: 669: 665: 660: 632: 627: 625: 622: 598: 595: 592: 591: 589: 575: 572: 569: 568: 566: 557: 553: 552: 545: 503: 500: 497: 496: 494: 493: 481:oblate spheroid 461: 458: 455: 454: 452: 408: 405: 402: 401: 399: 392: 389: 386: 385: 383: 382:, which make 62 370: 367: 364: 363: 361: 284: 249:is used by the 239:is used by the 230: 205: 202: 199: 198: 196: 162: 154: 146: 138: 130: 122: 114: 106: 56: 39: 28: 23: 22: 15: 12: 11: 5: 1638: 1636: 1628: 1627: 1622: 1617: 1607: 1606: 1601: 1600: 1585: 1571:Zubrin, Robert 1562: 1545: 1516: 1486: 1450: 1435: 1418: 1388: 1353: 1322: 1293: 1264: 1239: 1210: 1207:. p. 374. 1190: 1161: 1133: 1104: 1075: 1046: 1039: 1014: 1007: 955: 930: 905: 896: 861: 854: 836: 807: 778: 771: 753: 732: 699: 698: 696: 693: 690: 689: 676: 662: 661: 659: 656: 655: 654: 649: 644: 638: 637: 621: 618: 544: 541: 431:William Bourne 283: 280: 279: 278: 268: 258: 244: 229: 226: 177:unit of length 167: 166: 160: 151: 150: 149:≈ 1.15078 144: 135: 134: 128: 119: 118: 112: 103: 102: 99: 98: 93: 86: 85: 81: 80: 77: 73: 72: 67: 63: 62: 58: 57: 54: 46: 45: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1637: 1626: 1623: 1621: 1618: 1616: 1613: 1612: 1610: 1596: 1592: 1588: 1586:0-684-82757-3 1582: 1578: 1577: 1572: 1566: 1563: 1558: 1557: 1549: 1546: 1534: 1530: 1526: 1520: 1517: 1504: 1500: 1496: 1490: 1487: 1472: 1468: 1461: 1454: 1451: 1447:. p. 16. 1446: 1439: 1436: 1431: 1430: 1422: 1419: 1407: 1403: 1399: 1392: 1389: 1384: 1372: 1368: 1364: 1357: 1354: 1341: 1337: 1333: 1326: 1323: 1310: 1306: 1305: 1297: 1294: 1281: 1277: 1276: 1268: 1265: 1252: 1251: 1243: 1240: 1227: 1223: 1222: 1214: 1211: 1206: 1205: 1197: 1195: 1191: 1178: 1174: 1173: 1165: 1162: 1150: 1146: 1145: 1137: 1134: 1121: 1117: 1116: 1108: 1105: 1092: 1088: 1087: 1079: 1076: 1064: 1060: 1056: 1050: 1047: 1042: 1040:0-87021-157-9 1036: 1032: 1028: 1027:Annapolis, MD 1024: 1018: 1015: 1010: 1004: 1000: 996: 983:on 2016-08-21 979: 971: 967: 966: 959: 956: 944: 940: 934: 931: 919: 915: 909: 906: 900: 897: 882: 878: 871: 865: 862: 857: 855:9780850451634 851: 847: 840: 837: 825: 821: 817: 811: 808: 796: 792: 788: 782: 779: 774: 772:9780850451634 768: 764: 757: 754: 743:on 2017-08-14 739: 735: 733:92-822-2213-6 729: 725: 718: 717: 709: 707: 705: 701: 694: 686: 680: 677: 673: 667: 664: 657: 653: 650: 648: 645: 643: 640: 639: 635: 624: 619: 617: 615: 611: 607: 586: 584: 570:40,075.017 km 564: 550: 542: 540: 537: 532: 530: 525: 523: 518: 513: 491: 487: 482: 477: 474: 470: 450: 449:Edmund Gunter 446: 441: 436: 432: 428: 425:(such as the 424: 419: 417: 381: 376: 356: 351: 346: 345: 340: 336: 331: 329: 325: 321: 317: 313: 308: 307: 301: 293: 288: 281: 276: 272: 269: 266: 262: 259: 256: 252: 248: 245: 242: 238: 235: 234: 233: 227: 225: 223: 218: 214: 194: 190: 186: 182: 178: 174: 173:nautical mile 161: 159: 152: 145: 143: 136: 129: 127: 120: 113: 111: 104: 100: 97: 94: 92: 88: 82: 79:M, NM, or nmi 78: 74: 71: 68: 64: 59: 52: 47: 44:Nautical mile 42: 37: 33: 19: 18:Nautical Mile 1575: 1565: 1555: 1548: 1537:. Retrieved 1528: 1519: 1507:. Retrieved 1498: 1489: 1478:. Retrieved 1471:the original 1466: 1453: 1444: 1438: 1428: 1421: 1410:. Retrieved 1401: 1391: 1381: 1375:. Retrieved 1366: 1356: 1344:. Retrieved 1335: 1325: 1313:. Retrieved 1303: 1296: 1284:. Retrieved 1274: 1267: 1255:. Retrieved 1249: 1242: 1230:. Retrieved 1220: 1213: 1203: 1181:. Retrieved 1171: 1164: 1153:. Retrieved 1143: 1136: 1124:. Retrieved 1114: 1107: 1095:. Retrieved 1085: 1078: 1067:. Retrieved 1058: 1049: 1022: 1017: 994: 985:. Retrieved 978:the original 969: 964: 958: 947:. Retrieved 933: 922:. Retrieved 908: 899: 888:. Retrieved 876: 864: 845: 839: 828:. Retrieved 819: 810: 799:. Retrieved 790: 781: 762: 756: 745:. Retrieved 738:the original 715: 684: 679: 666: 587: 546: 533: 521: 514: 498:10,000,000 m 478: 471:). In 1633, 434: 423:great circle 420: 354: 343: 332: 306:mille passus 299: 297: 292:statute mile 270: 260: 246: 236: 231: 189:meridian arc 172: 170: 142:statute mile 95: 90: 66:Unit of 1509:1 September 440:Robert Hues 228:Unit symbol 1609:Categories 1539:2016-06-10 1480:2018-07-07 1412:2019-08-31 1377:2019-08-31 1155:2023-10-08 1069:2016-06-10 987:2018-01-04 949:2016-06-10 924:2016-06-09 890:2016-06-09 830:2016-06-10 820:www.un.org 801:2016-06-10 747:2017-06-20 695:References 558:10,000,000 433:stated in 350:milaria 60 181:navigation 1346:30 August 1315:6 October 1286:6 October 1257:6 October 1232:6 October 1183:6 October 1126:8 October 1097:8 October 563:centigrad 469:arcminute 467:feet per 355:Geography 344:Geography 328:longitude 324:meridians 316:parallels 298:The word 275:nanometre 1595:34906203 1573:(1996). 1533:Archived 1503:Archived 1467:NOAA.gov 1406:Archived 1371:Archived 1340:Archived 1309:Archived 1280:Archived 1226:Archived 1177:Archived 1149:Archived 1120:Archived 1091:Archived 1063:Archived 1033:. 1985. 943:Archived 918:Archived 916:. IEEE. 881:Archived 824:Archived 795:Archived 620:See also 576:360 × 60 522:authalic 357:states " 320:latitude 253:and the 213:latitude 1369:: 392. 602:⁠ 590:⁠ 579:⁠ 567:⁠ 556:⁄ 507:⁠ 504:90 × 60 495:⁠ 465:⁠ 453:⁠ 427:equator 412:⁠ 400:⁠ 396:⁠ 384:⁠ 374:⁠ 362:⁠ 339:Ptolemy 282:History 209:⁠ 197:⁠ 1593:  1583:  1404:: 74. 1037:  1005:  972:] 852:  769:  730:  536:Monaco 519:. The 380:stadia 193:minute 91:in ... 76:Symbol 70:length 1474:(PDF) 1463:(PDF) 981:(PDF) 974:(PDF) 968:[ 884:(PDF) 873:(PDF) 741:(PDF) 720:(PDF) 685:Meter 658:Notes 612:on a 549:metre 492:. So 314:with 175:is a 158:cable 117:1,852 110:metre 1591:OCLC 1581:ISBN 1511:2019 1348:2019 1317:2023 1288:2023 1259:2023 1234:2023 1185:2023 1128:2023 1099:2023 1035:ISBN 1003:ISBN 877:ICAO 850:ISBN 767:ISBN 728:ISBN 672:here 606:Mars 547:The 529:feet 322:and 300:mile 222:knot 126:foot 32:mile 341:'s 326:of 318:of 247:nmi 1611:: 1589:. 1531:. 1527:. 1501:. 1497:. 1465:. 1400:. 1383:m. 1380:. 1365:. 1338:. 1334:. 1193:^ 1118:. 1061:. 1057:. 1029:: 879:. 875:. 822:. 818:. 793:. 789:. 703:^ 599:60 585:. 330:. 271:nm 237:NM 206:60 171:A 165:10 1597:. 1542:. 1513:. 1483:. 1415:. 1350:. 1319:. 1290:. 1261:. 1236:. 1187:. 1158:. 1130:. 1101:. 1072:. 1043:. 1011:. 990:. 952:. 927:. 893:. 858:. 833:. 804:. 775:. 750:. 674:. 596:/ 593:1 573:/ 554:1 501:/ 462:3 459:/ 456:2 409:2 406:/ 403:1 393:2 390:/ 387:1 371:2 368:/ 365:1 277:. 267:. 261:M 257:. 243:. 203:/ 200:1 195:( 38:. 20:)

Index

Nautical Mile
mile
geographical mile

length
metre
foot
statute mile
cable
unit of length
navigation
territorial waters
meridian arc
minute
latitude
Earth's polar circumference
knot
International Civil Aviation Organization
Institute of Electrical and Electronics Engineers
United States Government Publishing Office
International Hydrographic Organization
nanometre

statute mile
mille passus
coordinate system
parallels
latitude
meridians
longitude

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