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Search: Posts Made By: SwiftCloud
Forum: Learning to Sail   09-21-2009
Replies: 7
Views: 925
Posted By SwiftCloud
If what you are looking for is a guide to...

If what you are looking for is a guide to celestial navigation - and for an easily comprehended account of the basic principles with a long-term almanac - search for 'The GPS User's guide to...
Forum: General Discussion (sailing related)   01-22-2009
Replies: 13
Views: 1,971
Posted By SwiftCloud
Absolutely, Sailingdog - the difference between...

Absolutely, Sailingdog - the difference between navigation and pilotage!

Three other things might perhaps be kept in mind - (i) We are not surveyors or cartographers, so fractions of a minute of...
Forum: General Discussion (sailing related)   01-21-2009
Replies: 13
Views: 1,971
Posted By SwiftCloud
I have difficulty with the idea that 'personal...

I have difficulty with the idea that 'personal error' can ever be regarded as reducible by mathematical means, although I know that this idea has currency. Fundamentally the various methods of sight...
Forum: Seamanship & Navigation   11-06-2008
Replies: 329
Views: 44,460
Posted By SwiftCloud
Aint that the truth, Valiente!. And if there is...

Aint that the truth, Valiente!. And if there is anyone out there who is still interested in using GPS as an aid in the development of CN skills, they might care to look at "The GPS Users Guide to...
Forum: General Discussion (sailing related)   08-20-2008
Replies: 19
Views: 2,063
Posted By SwiftCloud
And have a look at 'The GPS Users Guide to...

And have a look at 'The GPS Users Guide to Celestial Navigation' available via lulu.com
Forum: Introduce Yourself   05-28-2008
Replies: 3,452
Views: 957,863
Posted By SwiftCloud
New Zealand east coast and Polynesia

New Zealand east coast and Polynesia
Forum: General Discussion (sailing related)   05-27-2008
Replies: 13
Views: 1,971
Posted By SwiftCloud
If you can get your hands on a 1981 edition of...

If you can get your hands on a 1981 edition of Bowditch you will find a partial answer to your question. Basically, and while the ephemeral data for the fixed stars repeats (approximately) each leap...
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