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1919) to enable navigators on ships on the Thames to check their marine chronometers. The Time Ball drops daily at 1300hrs (GMT in winter, BST in summer)...
1919) to enable navigators on ships on the Thames to check their marine chronometers. The Time Ball drops daily at 1300hrs (GMT in winter, BST in summer)...
Royal Norwegian Navy (Kongl. Norske Marine, Den kongelige norske marine) German binoculars Chronometer from British submarine HMS Venturer Photo of a German...
