Re bad language, wait until they have finished and then tell them that 'sorry, I didn't understand a word of that, could you please repeat yourself' often works well! One or two large motor cruiser owners from the Brundall area, for example, would do well to play and inwardly absorb both those training videos! Well, perhaps not the bit showing Capt. BirdsEye tying a cow hitch rather than a clove hitch!