Wrong.

Rule of 12's applies.

Ifyou want to break it down into 2 hours portions it works out like
this:
First two hours it goes down 1/4, middle two hours is 1/2, last twohours is
1/4.

"Ellen MacArthur" wrote in message
reenews.net...

"Joe" wrote
| Wrong...another lubber I see. The rule of thirds is fo tital stream
| flows .
|
| For height you use the rule of 12.

Don't EVER call this girl a lubber, you farmer! :-)

Rule of thirds works for tide height. In the first two hours it goes down
1/3 of its height.
In the next two hours it goes down 1/3 more and in the last two hours it
goes down the last
1/3. (I think.)

Cheers,
Ellen