Bearings between 2 places trans-nationally

[Whitters]

I hope someone can help me with this question, but are there any websites that allow you to get a magnetic bearing between 2 places across the globe? If so any onformation would be gratefully received.

[silly bag man]

The site http://gc.kls2.com/ gives great circle distances, great circle maps, and ETOPS radii, but alas does not give numerical track information.

[Manflex55]

I also like this one :

www.ar-group.com/Time-Distance.asp (http://www.ar-group.com/Time-Distance.asp)

MF

[Whitters]

Thanks very much for those sites, they were still helpful. I'm sorry to have asked such an obscure question. Cheers once again.

[frigatebird1]

A great circle, by it's very nature, cannot have a constant magnetic bearing.

[Zeke]

Silly bag man,

Flying along an isogional will vary with altitude, potition and time, the magnetic field is a live 3D vector field and will change with altitude, latitude, longitude, and time.

frigatebird1

Great circles can have a constant true heading along the equator or along a longitude.

In other situations only rhumb lines have a constant magnet heading.

Great circles by clairauts formula have a constat number you can check, sin(true heading)*cos(latitude) = constant

[twistedenginestarter]

The other thing you can do is put the coordinates in your gps ;) ;) ;). This will give you a true or magnetic bearing.

If you don't know the coordinates then - if they are IATA locations - put them in the Great Circle Mapper http://gc.kls2.com. This will give you the coordinates (and a map etc). You can do a double check by seeing the distance is the same as your GPS said.

[frigatebird1]

Zeke, I thought the guy (might be a lady) wanted to fly between two places on the earth, not along imaginary lines.

[silly bag man]

OK here's another "how do I get from A to B" website.

www.landings.com/_landings/pages/search/search_dist_apt.html (http://www.landings.com/_landings/pages/search/search_dist_apt.html)

You put in the ICAO airport identifier for the departure and destination, your speed and endurance and the software calculates :

* Distance along great circle,
* Initial true great circle heading, and
* Flight time.

[Zeke]

silly bag man

I dont understand what you are saying.

I have written software for airlines that calculates the earths magnetic field for use in navigation and flight planning. I have never come across the term magnetic equator, is that a country specific term ?

The image below is the magnetic field at sea level with with the variation rounded to the nearest 5 or 10 degrees.

http://geomag.usgs.gov/images/dod_mf_d.gif

Could you please explain what you mean by the magnetic equator, and use the coordinates on the images as a reference...