Leap frog

This section of the canal has loads of swing bridges.
Usual amateur approach; stop before bridge, tie up, couple get off, open bridge, untie boat, motor boat through bridge, tie up, close bridge, couple get back on, untie boat, move off.
Super method, couple on bike overtake boat, open bridge, boat motors through without stopping, close bridge, couple on bikes leap-frog boat to next bridge.
Worked a treat - then see tomorrow.