Next message: C. Marin Faure: "TWL: Clever safety idea"
All optimization algorithms that can use constraints are victims of
inadequate human input expressed as constraints. In this simple case, it
could be made more useful and less dangerous by applying a time and/or
location constraint. Maybe the program could give you optimal speed of
advance settings once outside the bar. In other words, it could tell you to
go to WOT to catch a current enroute or to slow down because you will be
struggling against a tide somewhere else along the route. At least for PNW
mariners, I hope so. Here, on the less challenging East Coast, we can
probably get a good result. On some inlets, however, you still want to exit
or enter at slack or sometimes exit at ebb depending upon the wind.
You didn't tell us, how do it know about the weather? Even the mouth of the
Potomac can be uncomfortable with opposing wind and tide. I'd sure like to
see it compute Annapolis to Cape May - I always have to figure that one out
carefully.
Ron Rogers
Annapolis, MD
_/)
----- Original Message -----
From: "Joe Engel" <>
|
| So the ETA system works well in general tidal currents but check very
| carefully if you are planning on shooting one of the many dangerous
| rapids, narrows and bars we contend with in the PNW. Chances are ETA
| will be using the maximum speed of the current to help you on your way
| and that may not be a good thing.
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