It is great to see input by submariners on here. About that periscope. Yes you can put it full out and adjust depth with the sub to either let it be just above the surface. 1meter or less. I have done that a few times. However adjusting depth takes time. And it makes noise. So at the moment i go to periscope depth and just fiddle with the height by slowly clicking on it. I often am just on the border of water and surface and can still lock.
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