I think I’ll agree, although it should be noted again that this is indeed only based on whatever the general flow of thoughts says on the net. AND, on what you are doing with the sub, the SeaWolf would normally remain more quiet than an Akula when it’s travelling at 25kts, while that Akula travels maybe at a lower speed, on the other hand if that Akula is just hanging around on its electric motors, then it might be more silent than for example an LAI. So it all depends in which environment and what you are actually doing at that moment. If you’re turning, you will make more noise due to the disturbance of the water, if you’re just peddling ahead at 2kts without the use of any rudder (which will cause you to deviate from your track, but that’s unimportant while on the hunt) you will be more silent!