Channels and harbours in the Korsholm, Mustasaari Björkö region.
New and secured channels are marked in black. Small crafts routes, not secured, are shown with dashed lines. Fishing routes are marked with yellow lines.
At Valsörarna it is important to be exactly at the line! Floating marks can easily move in the current out there. Follow markings at the islets an do not trust floating marks! At som places the 1,4 m channel is as narrow as only 10 m.