English: Shotley Marina approach channel Seen here at low water, the mud and shingle banks can be seen on either side of the dredged channel in the approach to Shotley Marina, at the confluence of the Stour and Orwell rivers. A yacht waits on the landing stage for the tide to turn, to be able to enter the lock. The three posts, which are high enough to remain exposed at high water, indicate the eastern edge of the channel.