Its not unusual i dont think for subs to run the auxilary diesel motors just so they know they work, also the tug running backwards doesnt mean anything realy the tug is the brakes they do it all the time on big ships and submarines they also act as a steering system.

That is the back-up diesel running though I hope it is not always that smokey.It is an s-boat,but not swiftsure.She had a bigger rudder due to not having a pump-jet!

its faslane and its not raining!



the tug has thruster and a propeller that can turn 360 so she can push pull in any direction and no matter what diessels always make alot of smoke

From time to time, don't nuclear subs purge the secondary coolant lines? Something about acid buildup. However, I doubt that's what's going on there. Usually they get out to sea a couple miles and the deck is always cleared so the steam -- which is slightly radioactive -- doesn't hit anyone.

I'm sure that does wonders for the sea life.

and the fact thats shes decomissioned

Which s-boat is it then?I was told it was Sov?

Id put £1 on that its the swiftsure herself back in the 1990's