They did do night surface attacks although, in his book 'Silent Running' Jim Calvert writes that his skipper Tommy Dykers on the Jack - who seems to have been a great surface attack expert - was eventually viewed by his superiors as not having the aggression to carry out periscope attacks where he was more liable to be attacked and depth charged. I don't know whether this was a general belief in the sub command considering how devestating a surface attack can be.
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