A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Francis Upchurch
Date: 2016 Oct 29, 09:43 +0100
For those interested, the Browne-Nassau is even quicker and easier than Bygrave (no intermediates W,X, Y to work out.), but not quite so accurate. Gave 2730nm ,initial course 286˚. Good enough.
Dreaming of visiting Mystic Seaport for a Frank course and more (my sister in Boston, haven't been for 10 years, recently not well enough to fly, but who cares? Life is short.).
Just did GC from Penzance to Mystic with my Bygrave, took a couple of minutes, gave 2724 nm at initial course 285°. It was so easy to cross the pond by Bygrave! Google has a nice picture (see attached), but says 3149 miles . Oh dear, who to believe? Then I realised they use statute miles, not nm as per 1'=1nm ZD on the Bygrave. So we are both correct.
Unless I sail over on my boat (would love to, but I've probably left that a bit late!), I will have to add a 600 mile (statute) round trip to London for a flight to Boston. If I ever sailed over, it would probably not be along the GC course which would be mostly prevailing westerly’s on the nose all the way! I’d probably go the cowards southerly route which would be a lot longer, but a lot more comfortable.
Oh well, dream on!
Also see prior posts and attachments that make it easy to see the difference between the GC and RL courses:(I had forgotten that I had posted these tables.)