"Dave S" wrote in message
ink.net...
Here is a map

http://www.airnav.com/cgi-bin/fuelroute/1/ADK-ATU

Click on the airports to see which is which. BUT, heading from Adak to
Casco, you go EAST.. which means ADAK is west.

I don't trust Airnav's initial heading of 081. Clearly Attu (Casco) is west
of Adak.


Good job, Paul
Dave

Paul Tomblin wrote:

In a previous article, "S Narayan"
said:

"Paul Tomblin" wrote in message
...

Actually Adak is at +176.6460306 and Casco Cove is at -173. But even if
Adak was at -176 and Casco Cove was at -173 in my coordinate system (W
is
positive), Casco would still be further west than Adak.

However, no matter how you slice it, if you're at Adak and you want to
get
to Casco Cove, you go west. Look at a globe.

By international convention -ve longitudes apply to west of Greenwich and
+ve longitudes east of Greenwich. OK, let's forget that for the time
being.


I use a different convention.


Taking your example of Adak at -176 and Casco Cove is -173 ---- you
consider


No, Adak is at +176 and Casco Cove is at -173.


Casco WEST of Adak. Using this convention let's take a simple example
and


It is. Look at a map.


San Francisco, CA is at -122.4 and Reno, NV is -119.8. Using above


No, San Francisco is at +122.4 and Reno is at +119.


Adak really being at +176 indicates it is further West of Casco Cove
which is at -173. Moving Adak to -176 puts it 8 deg east of the original
location (but now across the date line) but still west of Casco Cove.


Wrong, wrong, wrongity wrong. Look at a map.