Good theory is that, Martin. Another look back in time, this time when sailing a centre boarder into the River Alde. Being very shallow draft, and at the first opportunity, sailed in over the bar. Once in just happened to look behind us to see, with horror, that several keel boats that had probably been waiting for the tide, had tried to follow our example, possibly thinking that we knew what we were doing. I did feel a bit embarrassed, having set such a bad example!