Comments by "Christopher Babilon" (@Cbabilon675) on "Dutch Submarines at the start of the Pacific Campaign - 'Ship a day' Helfrich leads the charge!" video.

It seems to me that all the Dutch submarines had engine troubles. Were these Dutch engineer diesel engines, or were they licensed by another Nation? Also, a question from my son about mines. How is it that they are able to Anchor in deeper waters? Do they have a certain amount of cable or chain? And how is it they know how much to use?
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