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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: What is this chart?
From: David F. McCune
Date: 2006 May 29, 00:28 -0500
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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From: David F. McCune
Date: 2006 May 29, 00:28 -0500
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
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To unsubscribe, send email to NavList-unsubscribe@fer3.com
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