I’m finding that tidal currents feature only allows me to view 1 day in advance. Is this normal? Sometimes it will allow me to view 2 days but irregularly.

Also, when a current at a given time reads 0.9mph North and the tidal current reads 1.4mph North, does this mean the “true” or overall current is 0.9mph, as “current” accounts for the 1.4mph tidal current and other forces which may work against the tidal current? Im based in North East Scotland if that helps.

Thanks