Quote:
Originally Posted by LGN1
in violent storms 'wave motion can reach 400 feet or more below the surface'.
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Hi. 400 feet but during... "extremely violent storms like hurricanes and cyclones". Wind speed of hurricanes and cyclones are more than 200 km/h, or 55 m/s.
SH3 does not simulate these storms. The biggest storms in the game, reflect only ~16 m/s. In addition, the text is based on the experience of a nuclear-powered ships, which have a much better sensor than the U-boats of World War II. In the latter case, the best sensors were their own feet. It should also be noted that the quote you provided is more focused on maintaining the perfect depth, and not feel the rocking ship. About this at all because there is no question: "during even moderate storms the submarine stays perfectly level at its submerged depth while the waves crash above".
A simple calculation of the depth of the impact of waves in the wind of 15 m/s for water movement under the water gives
only 8.1 m instead of 30 m. Therefore, I think that 30 m is much too large minimum depth for reloading torpedoes. Therefore, I believe that given by you quote perfectly agrees to comments by Erich Topp. The result is 8.1 m + ~10 m (from keel to hidden periscope of U-boot) = 18.1 m = ~20 m.