Wally wrote:

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.

If you count the arc with sign, whitch is probably the right thing to
do, you are right. I just counted the size - independent of direction.


Peter S/Y Anicula



"Wally" skrev i en meddelelse
...
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