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Message: <blockquote data-quote="PMN1" data-source="post: 63783" data-attributes="member: 134">From ’The Watery Maze’ by Bernard FergussonThe LSD was the brain-foster-child of Hussey’s, who had introduced it to an initially sceptical world at a meeting in the Admiralty in September. He handed round a photograph of a ‘Popper’ barge transporter, such as was used on the Danube. These flooded like a floating dock, and while so flooded shipped a barge on either side of their superstructure; they then pumped the water out, so that the barges were lifted clear of the water resting on sponsons on either side of the ship. Such a vessel had several advantages. She would be designed to carry two loaded LCTs in a hold, or dock, instead of on external sponsons, as in the Popper barge.Does anyone have any pictures of these Popper barge ships?</blockquote>

Verification: What year did the first man go to space? (answer has 4 numbers)