A few comments below:

Peter S/Y Anicula

"Wally" skrev i en meddelelse
...
Wally wrote:

That doesn't quite sound right - if the leg along the outer
circle, plus the leg along the inner circle, add up to a total of
180 degrees longitude, then the end point would be opposite the
start point.

This is wrong - it should be the *difference* between E leg on outer
circle and W leg on inner circle that gives 180 degrees...

Now you confuse me, isen't that what I said in the first place?


Start at 89d 42.447m S (roughly)...

The 14nm E leg traverses 45.7d longitude.

Go 14nm S to 89d 56.447m S...

The W leg covers 225.7d longitude.

Do 225.7 - 45.7 to get 180, and then go N 14nm to complete the
course. You are now on the original lat, but 180 degrees away from
your start point. The distance from the start is twice the minutes
from the start latitude to the pole...

90 - StartLat = 17.553 minutes from the pole

...which gives a distance of 35.11nm from the start to the finish.


So that would be around 210 nautical miles in my boat, assuming it
would keep a speed of 6 knot even with skies mounted under it - that
is well over 168 nm, and all that without any help from current.

Good work Wally! I will top Barts 5 points with a couple of
Anicula-points.




--
Wally
www.artbywally.com
www.wally.myby.co.uk