Sponsor Message:
Civil Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Nautical Vs. Statute Miles  
User currently offlineGlobetrotter From United States of America, joined Feb 2000, 174 posts, RR: 0
Posted (14 years 4 months 2 weeks 1 day ago) and read 11036 times:

For the benefit of me and others who are new to aviation, could someone please give a brief explanation of the difference between nautical and statute miles. Also what is the "great circle," and how does it apply to nautical vs. statute?

I've searched the archives and couldn't find a satisfactory answer to this. If it's there, I apologize. Many thanks for the education.

3 replies: All unread, jump to last
 
User currently offlineMls515 From United States of America, joined Jun 2000, 3076 posts, RR: 9
Reply 1, posted (14 years 4 months 2 weeks 23 hours ago) and read 10978 times:

Great Circle:

It's the shortest route between two points on the globe. It doesn't follow lines of latitute but rather it arches. Example: If you were to fly from Seattle to Bismark, ND you would probably skim over the US-Canadian border a little.

Nautical Miles-

One Nautical Mile = 1.15077945 regular miles.
http://www.boatsafe.com/tools/scale.htm
Don't kow the history. Sorry.


User currently offlinePurdue Arrow From United States of America, joined May 1999, 1574 posts, RR: 7
Reply 2, posted (14 years 4 months 2 weeks 23 hours ago) and read 10966 times:

As you probably know, latitude and longitude can be given in degrees, minutes, and seconds, with a minute being 1/60 of a degree, and a second being 1/60 of a minute. The origin of the nautical mile is that one minute of longitude is equal to one nautical mile. While a statute mile is 5,280 feet, a nautical mile is approximately 6,000 feet.

User currently offlineTimz From United States of America, joined Sep 1999, 6895 posts, RR: 7
Reply 3, posted (14 years 4 months 2 weeks 15 hours ago) and read 10940 times:

Since the earth isn't actually spherical, a degree (or minute) of latitude at the pole is 1% longer than a degree (or minute) of latitude at the equator. So in the past there have been several "nautical mile"s, ranging from around 6076 to 6082 (?) feet. But now it's officially defined as 1852 meters exactly, or 6076.1 ft.

If we pretend the earth is spherical, then the shortest path between two points (measured along the surface of the earth) is the one that has the least curvature-- in other words, the one that follows a arc that has the largest possible radius. The largest possible radius is the radius of the earth itself; so the shortest path is along a circle whose center is at the center of the earth. That's what a great circle is.


Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Upgrading With Miles (VS) -> Couple Of Q's posted Sun Jul 15 2007 11:16:02 by Swiftski
Do Airlines Use Miles Or Nautical Miles? posted Sun Jun 18 2006 19:14:31 by QuestAir
Buying Upgrades With FF Miles-Europe Vs. US posted Thu Mar 3 2005 01:45:00 by FokkerVII
AA Miles Redemable On VS, KLM, SAS posted Tue Aug 10 2004 00:18:28 by Squirrel83
NW Miles On CO/VS? posted Fri Aug 15 2003 22:35:29 by Luv767s
Where Should I Credit My Miles?VS Or Sia? posted Sun May 5 2002 19:52:31 by Dvintiadis
Nautical Miles posted Thu Jan 11 2001 21:41:28 by FlyVirgin744
Frequence Plus VS MILES&MORE posted Wed Oct 25 2000 11:30:13 by Shanti
Nats Vs Eurocontrol Vs. College posted Sun Aug 30 2009 03:49:41 by DAL763ER
Airline Seating Map Vs Seatcounter.com posted Mon Aug 24 2009 17:02:12 by BlueFlyer