TKMS Type 212CD (Victoria class replacement megathread)

[Oldgateboatdriver]

The submarine must first locate a suitable lead or thin patch, manoeuvre beneath it, control depth, trim and heading, arrest its movement, maintain position despite currents and ice drift, and retain the ability to back away and try again if the selected position proves unsuitable. All of that requires propulsion, control authority and available power. So while you don't use momentum, you still need propulsion.

Yes, but not so much propulsion that only a nuclear submarine can do it. Kevin seemed to intimate that only a nuclear boat has enough propulsive power to achieve that, which is not the case.