The LAT is the lowest predicted tide, not necessarily the lowest tide that ever occurred.
Its quite possible for weather conditions to create an even lower tide, but LAT, LLWLT,
MLW, and MLLW all relate to astronomical predictions, not the actual observations. I
wonder how frequently they adjust for the rising sea level?

-jeff



"Donal" wrote in message
...

"Jeff Morris" jeffmo@NoSpam-sv-lokiDOTcom wrote in message
...
No - LAT is "Lowest Astronomical Tide" or the lowest tide that would be
predicted. LLWLT,
or "Lower Low Water Large Tide" is the average of the lowest low water for
each year in a
19 year cycle.

Presumably, LAT would be the lowest of the lowest low water in the 19 year
cycle, not the
average.


That would really depend on whether the lowest low had been predicted,
wouldn't it?

Anyway, LAT is much better than LLWLT.

For one thing, you can remember the letters without having to look them up!


Regards


Donal
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