DSK wrote:

"Peter S/Y Anicula" wrote...

If you only know the time of HW and LW, you can assume that the

curve

of the tidal current will look a bit like a sinus curve.


Yes, that's true. The current will also follow the 'rule of 12s'
somewhat, lagging because of the momentum of the water in motion.

In the absence of current tables, assume the max current is at 7/12s the
interval between high & low water.


Got that wrong Doug. Tidal stream is generally strongest at the time of
the fastest rate of change of tide height. That is most often about
halfway between high and low water. Look it up.

Cheers