NavList:

Is there an open source for the latest tidal constants for UK ports - other
than by buying Vol 1 of this year's Admiralty Tide Tables?
I see that US port constants are available free on the internet, but it
wouldn't be a surprise in our 'Thatcherised' society that such information
for the UK has to be paid for:  the same philosophy as for access to weather
forecasts.
I have written, for interest really, a programme to calculate tide heights
from the Meeius(?) algorithms which works accurately enough for most
practical purposes.  Times of high and low water are pretty good - who can
spot the precise moments of these anyway? - but tide heights (for the nicer
places to visit!) depend on the topographical shifts which are reflected in
the most recent tidal constants.

Geoff Butt


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