"Peter S/Y Anicula" wrote in message
...
It depends of the area and of the duration of the trip.

There is 3 sources of tidal current: Tidal current tables (ATT),
Tidal
current charts and tidal currents shown in the sea charts.

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.
Generally there is a period of relatively weak currents around HW
and
LW and the current will run faster halfway between HW and LW.

That's what I thought, but I want to be sure.



If the trip is expected to take 9 hours it would best to leave
around
6.30
so you can sail in two periods of slack (weak currents) and one
period
of favourable current.
If the trip is expected to take 3 hours, if you leave around 9.30
you
should be able to sail the whole trip in favourable current.


Should take about 8 hrs., but you know sailing, could be longer.
At a different location there is a narrow channel , with strong
currents, to go through. this should be done at slack tide.


I'm sure Donald or some of the others who sail in areas of strong
tides could elaborate further, but they probably think that you need
the mental exercise of figuring it out yourself.

Nah, they know me better than that.

Thanks, Peter.

Scotty