"Keith Willshaw" wrote in message
...

Because they have around 30 nautical miles to cover in
barges good for 4 knots , even if we ignore the effects
of the Channel rip currents they would need more than 24 hours
to get the first wave across and then they need to ferry
more troops and supplies using converted river barges
towed by tugboats.


Why does it take a full day for the first wave to cover 30 miles at 4 knots?



I wouldnt have wanted to be in one of those deathtraps
even if nobody was shooting at me but let loose
30 destroyers and 10 cruisers from harwich and the
result wont be pretty.


They'd certainly get some of the invasion force, but those surface vessels
wouldn't last long against determined airpower without supporting airpower
of their own.