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1996-09-26
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3KB
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78 lines
This is !Tides, Version 1.3 (27 Sep. 1996)
Use
=========
Perhaps there is no use for this program. It is of interest to me, and I
would love to find the methods of accurate tide prediction. This is not
accurate, though it never gets too far from the normal tide predictions
at Clacton.
Explanation
============
John Collier writes in the Compendium Artis
Nauticae, published in 1729-
"Each problem of navigation, is rendered intelligible to the meanest
capacity. Rule:divide the date of the year by 19, add one to the remainder,
and you have the Golden number; multiply that Golden number by 11 and divide
the product by 30, the remainderis the epact.... To the epact add , in the
month of January 0, February 2, March 1, April 0, May 3, June 4, July 5,
August 6, September 8, October 8, November 10 , December 10 and the day of
the month, if this sum is less than 30 it is the moon's age; if greater than
30 subtract 30 from it, and the remainder is the moon's age. Multiply the
moon's age by 4 and divide the product by 5, the quotient are the hours,
and the remainder are the minutes of the moon's southing."
The author adds laconically :
"Note While the moon is in the increase she souths, before midnight; while
she is decreasing she souths before noon. These things are known by every
cabbin boy, colliers nag and waterman's servant, and therefore needs no
further explanation."
Good stuff for a computer!
Disclaimer
==========
Please don't use this as an accurate predicter of tides. It usually seems to
be within an hour of the correct time at Clacton.
Customising
===========
If you want a customised version for your pet fishing village, send me the
difference in time of tide between there and Dover.
Copyright
=========
This program is Public Domain. It may be distributed or copied freely as
long as no part of this software may is used in any other program, whether
commercial or public domain,without my prior written consent, though any
files created by this software are not bound by this condition. This
software may not be distributed for a profit, save that required to cover
packaging and media costs..
Copyright (©) is retained by the author, who may be contacted at the address
beneath. No liability can be accepted by the author for any loss or damage
arising from use or misuse of this software.
Credits
========
Please read the Credits file, obtained by double clicking over the !Tides
icon in the filer directory, whilst holding down the <shift> button.
-----------------------------------------------------------------------------
Any problems or queries to :.
Robert Seago
40 Alton Park Road
Clacton On Sea
Essex.
CO15 1ED