Labels:text | screenshot | glasses | human face | sunglasses | goggles | eyewear OCR: Foreword Why doesn't a submarine have windows? How do sumariners see, hear and speak under water? How do submariners try to keep their position a secret? How do submarines/submariners breathe under water? How do submariners know where they are under water? How heavy is a submarine and how is the weight measured? How does a submarine go under water and stay there? How does a submarine dive and come back up again? Does the submarine carry any fresh water? How important is food and its preparation? What happens to the waste with no dustbins or collection? Why does Britain need submarines? How does a fleet submarine fire its torpedoes or missiles? Why is a submarine often called a boat? If the reactor stopped working at sea, how would a nuclear submarine get back to base? How are submarines built at Barrow? When did Barrow build its first submarines? How many submarines has Barrow built? How many Royal Navy submarines today are from Barrow? About BAE SYSTEMS Marine
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