On Mar 17, 4:31*pm, Peter Skelton wrote:

They'll have to surface and use their guns. Not much of the
invasion fleet was big enough to torpedo.

The barges + tugs certainly weren't, but there would be a fair number
of coasters and the like that would certainly detonate a torpedo if
hit. And in a Sealion scenario, I can see putting everything the RN
has out there for the fight. No sense in giving the Germans even a 1%
chance of success...

Chris Manteuffel