An old film was showing on the digital channel, Talking Pictures, last evening. Called "The Steel Key," and made in 1953, there were some sequences shot at Newhaven. In the background was the ferry "Brighton", and to represent a private motor yacht was the MV "The Mae MacCleod." She was a converted Fairmile "B" motor launch, with seating for passengers around the deck, and was clearly a pleasure cruiser for paying passengers.
Anyway, compared to some of the acting, the "motor yacht" was the least wooden thing on the screen...