Some thoughts.....
Home is the place to start looking for Chilean info. They may have something that can be used with
openCPN
In Rio de la Plata the sea level is influenced to a truly remarkable degree by the weather/wind. I don't think I ever used tide tables there.
South of the Brazil/Uruguay border there is the north going Falklands
Current which runs inshore of the prevailing south going circulation (Brazil
Current?).
As stated there are big tidal ranges along the Argentinian Patagonian coast which have quite an effect a considerable distance
offshore from the major headlands and can lead to very nasty
wind over tide conditions.
It is not a good idea to consider entering Magallanes from the east. Considerable tidal streams, no shelter, and prevailing strong westerlies... and thats before you get to the narrows.
Once into the Beagle and heading up the channels the tides are only critical in a few places.
Canal Barbara I have never been through and can't help with. Ackwalnisan I shall post shortly when I get back to the
boat ( you need to know the tide at P Arenas.)
Canal Chacao is 'interesting'.
The rest is straight forward.
As mentioned above the range gets quite large north of Boca de Guafo, south of there it is in the order of a few metres and the vast majority of the
anchorages are deep.
I carry the hard copy Chilean tables... me being old fashioned and all.
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