Home » Archimedes archive » Acorn Computing » 1994 08.adf » 9408 » PD/!FontMsgs/!Tides/!Help

PD/!FontMsgs/!Tides/!Help

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Archimedes archive » Acorn Computing » 1994 08.adf » 9408
Filename: PD/!FontMsgs/!Tides/!Help
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File size: 0FF6 bytes
Load address: 0000
Exec address: 0000
File contents
This is !Tides, Version 1.2   (27 Jan 1994)

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 it seems here 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, beforemidnight; 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 accrate predicter of tides. It usually seems to be within an hour of the correct time at Clacton.

Customising
===========
 If you want a customised version fo 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.

The program has been amalgamated with !EventShell using
!BLibII by Ian Palmer.

The resulting program has been 'shrunk' using
!BasShrink by John Wallace.

EventShell =========

Thanks to Paul Hobbs for his very useful !EventShell System.

This application uses the library of routines of the above name, which
provide an easy way of genereating a Wimp Program. 

I recommend this system which can be obtained from APDL or other PD
Libraries.
This program has been written using the routines supplied with the EvntShell library which is copyright Paul Hobbs. The library routines may be distributed subject to the following conditions:

You have permission to use any part or the whole library in a project you intend to place in the public domain, as long as I am fully credited (via the inclusion of this file in the program documentation). If you wish to use these routines in a program that is for sale (for however much and for whatever reasons) or released as copyright material then my express permission in writing must be obtained. I maintain copyright on all the material supplied and reserve the right to amend these conditions
in cases where I deem misuse. 

The library code is supplied free of charge to everyone 'as is'. There is no guarantee that it is free from bugs and no warranty is given about its suitability for use.

Further details about EvntShell may be obtained from the author:

Paul Hobbs
Rheinpfalzstrasse 2
85049 Ingolstadt
Germany

The heap manager routines used by EvntShell are copyright Risc User and are used with permission.

----------------------------------------------------------------------------- 

Any problems or queries to :.

Robert Seago
 
40 Alton Park Road
Clacton On Sea 
Essex.

CO15 1ED
00000000  54 68 69 73 20 69 73 20  21 54 69 64 65 73 2c 20  |This is !Tides, |
00000010  56 65 72 73 69 6f 6e 20  31 2e 32 20 20 20 28 32  |Version 1.2   (2|
00000020  37 20 4a 61 6e 20 31 39  39 34 29 0a 0a 55 73 65  |7 Jan 1994)..Use|
00000030  0a 3d 3d 3d 3d 3d 3d 3d  3d 3d 0a 50 65 72 68 61  |.=========.Perha|
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00000d20  77 72 69 74 69 6e 67 20  6d 75 73 74 20 62 65 20  |writing must be |
00000d30  6f 62 74 61 69 6e 65 64  2e 20 49 20 6d 61 69 6e  |obtained. I main|
00000d40  74 61 69 6e 20 63 6f 70  79 72 69 67 68 74 20 6f  |tain copyright o|
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00000d70  72 65 73 65 72 76 65 20  74 68 65 20 72 69 67 68  |reserve the righ|
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00000d90  20 63 6f 6e 64 69 74 69  6f 6e 73 0a 69 6e 20 63  | conditions.in c|
00000da0  61 73 65 73 20 77 68 65  72 65 20 49 20 64 65 65  |ases where I dee|
00000db0  6d 20 6d 69 73 75 73 65  2e 20 0a 0a 54 68 65 20  |m misuse. ..The |
00000dc0  6c 69 62 72 61 72 79 20  63 6f 64 65 20 69 73 20  |library code is |
00000dd0  73 75 70 70 6c 69 65 64  20 66 72 65 65 20 6f 66  |supplied free of|
00000de0  20 63 68 61 72 67 65 20  74 6f 20 65 76 65 72 79  | charge to every|
00000df0  6f 6e 65 20 27 61 73 20  69 73 27 2e 20 54 68 65  |one 'as is'. The|
00000e00  72 65 20 69 73 20 6e 6f  20 67 75 61 72 61 6e 74  |re is no guarant|
00000e10  65 65 20 74 68 61 74 20  69 74 20 69 73 20 66 72  |ee that it is fr|
00000e20  65 65 20 66 72 6f 6d 20  62 75 67 73 20 61 6e 64  |ee from bugs and|
00000e30  20 6e 6f 20 77 61 72 72  61 6e 74 79 20 69 73 20  | no warranty is |
00000e40  67 69 76 65 6e 20 61 62  6f 75 74 20 69 74 73 20  |given about its |
00000e50  73 75 69 74 61 62 69 6c  69 74 79 20 66 6f 72 20  |suitability for |
00000e60  75 73 65 2e 0a 0a 46 75  72 74 68 65 72 20 64 65  |use...Further de|
00000e70  74 61 69 6c 73 20 61 62  6f 75 74 20 45 76 6e 74  |tails about Evnt|
00000e80  53 68 65 6c 6c 20 6d 61  79 20 62 65 20 6f 62 74  |Shell may be obt|
00000e90  61 69 6e 65 64 20 66 72  6f 6d 20 74 68 65 20 61  |ained from the a|
00000ea0  75 74 68 6f 72 3a 0a 0a  50 61 75 6c 20 48 6f 62  |uthor:..Paul Hob|
00000eb0  62 73 0a 52 68 65 69 6e  70 66 61 6c 7a 73 74 72  |bs.Rheinpfalzstr|
00000ec0  61 73 73 65 20 32 0a 38  35 30 34 39 20 49 6e 67  |asse 2.85049 Ing|
00000ed0  6f 6c 73 74 61 64 74 0a  47 65 72 6d 61 6e 79 0a  |olstadt.Germany.|
00000ee0  0a 54 68 65 20 68 65 61  70 20 6d 61 6e 61 67 65  |.The heap manage|
00000ef0  72 20 72 6f 75 74 69 6e  65 73 20 75 73 65 64 20  |r routines used |
00000f00  62 79 20 45 76 6e 74 53  68 65 6c 6c 20 61 72 65  |by EvntShell are|
00000f10  20 63 6f 70 79 72 69 67  68 74 20 52 69 73 63 20  | copyright Risc |
00000f20  55 73 65 72 20 61 6e 64  20 61 72 65 20 75 73 65  |User and are use|
00000f30  64 20 77 69 74 68 20 70  65 72 6d 69 73 73 69 6f  |d with permissio|
00000f40  6e 2e 0a 0a 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |n...------------|
00000f50  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
*
00000f90  2d 20 0a 0a 41 6e 79 20  70 72 6f 62 6c 65 6d 73  |- ..Any problems|
00000fa0  20 6f 72 20 71 75 65 72  69 65 73 20 74 6f 20 3a  | or queries to :|
00000fb0  2e 0a 0a 52 6f 62 65 72  74 20 53 65 61 67 6f 0a  |...Robert Seago.|
00000fc0  20 0a 34 30 20 41 6c 74  6f 6e 20 50 61 72 6b 20  | .40 Alton Park |
00000fd0  52 6f 61 64 0a 43 6c 61  63 74 6f 6e 20 4f 6e 20  |Road.Clacton On |
00000fe0  53 65 61 20 0a 45 73 73  65 78 2e 0a 0a 43 4f 31  |Sea .Essex...CO1|
00000ff0  35 20 31 45 44 0a                                 |5 1ED.|
00000ff6