An Ottoman army heliograph station in Palestine. A heliograph flashes sunlight to make Morse code messages. | laststandonzombieisland

An Ottoman army heliograph station in Palestine. A heliograph flashes sunlight to make Morse code messages.

Posted on August 24, 2018 by laststandonzombieisland Leave a comment

An Ottoman army heliograph station in Palestine. A heliograph flashes sunlight to make Morse code messages.

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