Hard to believe they would be stupid enough to try it. Bubbles are real bad if you are trying to be quiet.
Um, no..
Even the Razorback had the (at the time, new) prairie masker system
Had no idea Prairie Masker was that old. Still in use today on the DDG's and CG's. They are also blowing bubbles out of another underwater part.
ETA: Since you can find it on the net, they also blow bleed air out of the screws too. Nothing to do with speed, it masks acoustic signature.
