Rather than have the subs exposed on deck is it possible with todays technology to tow the submerged sub at a high enough speed to shorten crossing times? If the support ship is attacked then couldn'r the sub slip the tether and  dissappear?  The tether could provide electricity for the subs propulsion and a gps link of some sort to keep the sub and tender on the same course and speed?
Or just not a practical idea?

Please help

I didn't find the right solution from the internet.

Web Animation Service

Thank you