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"Jim Carter" wrote in message
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On 23 Sep 2005 04:58:45 -0700, wrote:

They may be listed as wave height, but the underlying wave is a swell,
and
the waves are considered wind waves on top of the swells.
Thank you for making my point, that you were once again WRONG.
It should probably be pointed out that "wave height" is the wave top
in reference to sea level. If you were there in a boat the wave would
actually be close to twice that big since there is also a valley.

Wave heights on the Great Lakes are measured "From Trough to Crest".
Also, if I remember correctly, Bowditch classifies wave height as the
distance from the trough to the crest of a wave, equal to double the
amplitude, and measured perpendicular to the direction of advance. This
then, should be the correct way to measure wave height.

Jim

Sounds right, although someone in this discussion (and I'm too relaxed to go
back and see who) believes that when your boat comes down from the crest of
a wave, it only settles halfway to the trough. I'd love to know how,
considering that my yacht's only 14' long and things can get "interesting"
in big waves.

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