This was the South Broads station, which serves the Broads - inland waterways consisting of large lakes with interconnecting rivers some of which are quite narrow. Wash is seen as a big issue on the Broads, more so than speed, as it causes bank erosion which results in silting up of the bottom. The Broads Authority invest millions every year in dredging the Broads trying to keep them clear, hence the RNLI wanted to find the most suitable craft for that location. They also tried one of those A class (it is A class isn't it??) that they normally use on beaches. In the end, as I said they went back to using a D class. They also have one of those tiny ones thats normally a tender to all weather boats, which they use in areas where there is hardly any depth. They normally keep that boat on the back of a truck, which can be driven anywhere in the broads and the boat launched in the event of an emergency. Pretty cool stuff