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Old 20th Jan 2022, 6:02 am   #22
dagskarlsen
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Join Date: Jan 2008
Location: Hakadal, Norway
Posts: 602
Default Re: On-board ship communications

I have asked a little around, and it seems like the 3 most common solutions was:
1) Really old tube system with whistle
2)Magneto telephones with local batteries
3)Magneto telephones with voice powered transmitters
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