> A simple program which works out a tide table based on the nearest

![][1]

>
>
> A simple program which works out a tide table based on the nearest
> high and low tides. It uses the assumption that the tide rises in a
> sine curve (see graph above) which is fairly accurate in most cases.
> But, like all tide calculations, it is an approximation and should
> be treated likewise.
>
>

How to use:

To use TideMate, you need the times (in 24 hour notation) and heights
(in meters) of the preceding and following high/low tides which are
entered in the ?Earlier Tide? and ?Later Tide? fields in the ?Input
Data? area.

Some tide tables are given for ?Standard Ports? with corrections given
for other places. If this is the case, you can enter the corrections
in the ?Corrects? fields and the program will do the calculations for
you. If the time is a minus correction, click the ??? radio button; if
the height is a minus correction, you must enter the minus into the
height field with the data, the radio buttons only apply to the time.

When the ?Calculate? button is clicked, any corrections will be
applied and the new times and heights shown in the ?Corrected Data?
area. The range of the tide and the duration are shown at the bottom
left of the window.

The ?Calculate? button also creates a Tide Table which is shown on the
right. This calculates the height of the tide for approximately every
20?25 minutes (depending on the duration of the tide). The earlier
tide, mean level and later tide are shown in boxes.

The tide table can now be exported in SimpleText format by selecting
?Export Table?? from the ?File? menu.

Required Data

The fields in the ?Required Data? are used when you wish to know the
height of tide at a specific time (?What Height?), or the time when
the tide reaches a certain height (?What Time?).

DL #1 TideMate v1.0

Compatibility
Architecture: 68k

NB. There is little error checking on the program, ie. there is
nothing to stop you entering 65 minutes or 25 hours. A good navigator
should double-check his figures anyway.

[1]: http://macintoshgarden.org/sites/macintoshgarden.org/files/imagefield_thumbs/screenshots/tmgraph.gif