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Originally Posted by ASWnut101
Signal  defenition?)  |
Subs fire out smoke candles for various communications purposes, see
http://www.ukho.gov.uk/content/amdAt...NM8%202006.pdf for a couple of examples. The same launchers can be used for other sensors like expendable bathythermographs or active/passive decoys. RN ones are only about 4" in diameter.
Again - why complicate your life building a launcher out through the superstructure when these can be launched out through the side of the hull with only a simple hull gland to close them off.