Great replys, guys!!
I'm thinking about (for example) Scapa flow. Was it possible to enter the eastern approach (trough the narrow strait with the shipwrecks) when the water was low? Or was it possible only in high tide? (Would be nervwrecking to finish off some niiiice targets in SHIII, just to discover that your way out of there is in too shallow waters, and the DD's are approaching fast behind you....)
