At the end of October we get the last of the very high, so called "Spring" tides. The next very high Spring tide will come in 6 months' time - in Spring. This October high tide carries boats up to the highest possible resting point, and leaves them on the mud until April when they can be floated off again.
This natural phenomenon allows sailors to maintain their boats high and dry on the mud and then float them back easily when the sailing season comes again.
The river authority can also open the control gates at the time of the very lowest tides and allow the level of the water to sink to the minimum and carry out maintenance to the banks. This is the time when all the old bicycles and super-market shopping trolleys - and the occasional dumped fire arm - appear, and can be collected.
This photo shows the boats moored at Hammerton's Ferry, and attempts (with only limited success) to catch the glamour of the bright October sun shining on the wet mud as the tide goes down.