According to Wikipedia,
In boats and ships, keel can refer to either of two parts: a structural element, or a hydrodynamic element. These parts overlap. As the laying down of the keel is the initial step in construction of a ship, in British and American shipbuilding traditions the construction is dated from this event. Only the ship's launching is considered more significant in its creation.The first one shows two very small Keels on two very small crafts, but Keels they are supposed to be. They had obviously been put ashore for the winter (if you wonder about the rather vibrant colours, I have used what is called a HDR-technique).
The other day I found one of them still lying on the jetty - in September. Maybe the Keel was Kaput.