Joined Nov 2010
10,011 Posts | 3,078+
Stockport Cheshire UK
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You can’t seal off anything with a ww2 submarine, all they are capable of is firing a couple of torpedoes at a warship as it rushes past, they might cause a couple of casualties but they wouldn’t even slow the majority of them down let again stop them.Regarding the navy - Germany didn’t need one that could match Britain battleship for battleship did it? It needed a combination of air and naval forces, especially submarines, that could seal off the invasion zone for long enough.
Once the British got a sizeable naval force amongst the invasion fleet the disruption it would cause would be more than enough to wreak the invasion.Don’t ask me what long enough is.
The task had been given to the lighter British forces, they would have overwhelmed any German escorts in minutes.I realise it would be done as a last resort but I imagine that sending the Royal Navy’s main fleet into the tight confines of the southern end of the North Sea and the Channel would keep the admirals awake at night.