Peter S/Y Anicula wrote:
The terminology is not quite right, substitute inner circle with the
leg along the inner circle...
So it should be:

You would start with the leg along the outer circle going east then go
closer to the pole moving south...

I hadn't realised it would work differently at the south pole... I'll do
some numbers later and see what I come up with.


If the leg along the inner circle has an arc of 180 degrees plus the
arc of the leg along the outer circle, then the end-point should be
opposite the start-point,

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.


and the distance over the pole would be 2 x length of legs plus
diameter of inner circle: more than 28 nm in at 1 knot and
more than 168 nm at 6 knot.

Yup. Proving that my compass does indeed work, in some places at least.


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