Y'see, there's a tank museum up here, at Denny, but it's tanks of water with ship models in it. The models are the ones the designers used to make sure that the ships they were going to build were actually likely to be seaworthy. It was a ship model experiment tank, but it's known as the Tank Museum.....and it confused the hell of so many people who were expecting to see armoured vehicles.
I have no idea how I know that the other real tank thing is in Dorset though :dunno:
Denny Ship Model Experiment Tank, Dumbarton
www.scottishmaritimemuseum.org