Full hull model of a motor and sail whaler (1960), built at a scale of 1:12. The model is decked, equipped and rigged, with the sails set. On the base are plaques inscribed ‘27ft Motor Whaler Sea Boat with its regatta rig’ and ‘3 in 1 Whaler scale 1" equals 1' Model by the ship department’. Also on the base is the number ‘55’.

Used as an all-purpose sea-boat by the Royal Navy, the whaler replaced the traditional Montague 27ft pulling and sailing type in the 1960s. Although the types are very similar, the three in one is fitted with a petrol engine, which increased its efficiency in performing its primary role as a sea-boat. Whalers were also used as recreational boats by the Navy both for leisure and racing, hence the regatta rig on this model.