NavList:

Are you referring to a set of pilot charts?  I have those.  I think the
chart I was asking about is from old sailing directions.  Since my post, I
found a similar chart in Pub. 152, "Sailing Directions (Planning Guide) for
the North Pacific Ocean" 1989 Edition.  I like it because it is fairly
small, simple, and shows many common great circle routes.  The pilot charts
have a wealth of information, of course, but just a few of the common great
circle routes.

The reason I care about all this is because I sail solo, and I've noticed
that I almost never see ships far out in the ocean that are not on a great
circle route from one port to another.  So by having a quick reference for
seeing, say, the great circle route between Balboa and the Luzon Strait, I
can figure out if I am safe sleeping several hours at a stretch or if I need
to keep a better lookout as I cross one of these routes.

I can do the same thing by drawing the routes myself of a great circle
chart, and then plotting my own position on that chart, but it is easier to
have a mercator chart with the common routes drawn.

If anyone happens to have a Pub. 140 (North Atlantic sailing directions),
perhaps you could tell me if there is such a chart tucked into the book as
there was in the North Pacific version.

David


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