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Thanks.
I actually have the book, but read only the cell nav chapters,
and somehow forgot that is also contains all other things related to navigation:-)

Alex.
________________________________________
From: NavList@fer3.com [NavList@fer3.com] on behalf of Bob Crawley [NoReply_Crawley@fer3.com]
Sent: Sunday, February 17, 2019 9:01 AM
To: eremenko@math.purdue.edu
Subject: [NavList] Re: Historical tides

I recommend Lecky's Wrinkles in practical 
navigation 
- S.T.S.Lecky available online. My 1917 edition discusses the "establishment" 
of ports. From this and a knowledge of the phase of the Moon it is possible 
to calculate the tidal prediction, albeit not to today's precision. Either in 
that edition or an earlier one there is discussion of the "Edact" which is 
required to calculate both the date of Easter and the Moon phase - I found it 
hard to get right. The book is a delightful read and one of the many 
treasures I've discovered through navlist.

Have fun

Bob C

   

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