- submarine bell signal
-
сигнал подводного колокола
English-Russian dictionary of geology. 2011.
English-Russian dictionary of geology. 2011.
submarine bell — noun : an underwater sound transmitting device using the strokes of a bell to send messages or to send at stated intervals a signal as an aid to navigation in a fog … Useful english dictionary
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History of steamship lines — The shipping company is an outcome of the development of the steamship. In former days, when the packet ship was the mode of conveyance, combinations, such as the well known Dramatic and Black Ball lines, existed but the ships which they ran were … Wikipedia