Originally Posted by
Jetstream67
So the array was deployed but did not 'see' the sub ? Did the Sub not detect the ship either ? Both seem unlikely
I wonder if Russians, fed up with being tracked around the Atlantic, decided to do a bit of vandalism to see what it takes to send an anti sub vessel home. Not a lot it seems
In all likelihood the sub would be well aware of the ship but may not have known about the silent towed array when it elected to pass astern of the Northumberland. From my brief brush with these things, the stern arc is an area of weakness for passive sonar on both ships and submarines on account of the spinning bits, hence the need to clear stern arcs from time to time to make sure you are not being followed . Perhaps the submarine was trying to move into the trail?