Even that would involve filling the hull up to the lower deck with electrolyte and, to balance the pressure, probably flooding the bottom part of the dry dock with Thames water.
The next morning, I enjoyed a leisurely repast on my deck and then took a stroll down to the Lodge's tiny "beach" and kayak dock, marveling at the clarity of the water and the chutzpah of a golden retriever repeatedly plunging into its iciness.