Posted by kevin lazenby on
URL: https://www.shado-forum.com/Sky-1-Flying-Sub-1-tp1491793.html

Several points worth pointing out, between Sky 1 & Flying Sub: The Flying
Sub was shown re-docking with Seaview on several occassions, and it was
also held in its own Silo (like Trident/Polaris missiles), and also the
Silo was permanently full of water.

These would probably make the Flying Sub more "believable" than Sky 1.