The Siebel Ferry was designed and built specifically for SeaLion. There were 6 or 8 ready on time. Not really much for an invasion, but there were hundreds ready in time for the evacuation of Sicily, an operation which ran smooth as silk.
Aerial torpedoes and other basic anti-shipping weapons also seem to have got an impetus based on SeaLion, not ready on time, but available for later mischief.
Aerial torpedoes and other basic anti-shipping weapons also seem to have got an impetus based on SeaLion, not ready on time, but available for later mischief.