o sung wu,

Noise is something that the movies get right about submarines.

You should hear tapes of US nuclear submarines in close proximity to one of our old subs (of over thirty years ago), the Yanks had no idea that our sub was anywhere near them.
On one famous occasion, one of our subs carried out a mock attack on the USS "Enterprise", got right through the destroyer and sub screen and surfaced after passing under her; signaled " You're sunk" and the "Enterprise" blossomed with white uniformed figures, staring in amazement at the Aussie sub.

I got the above from a number of the subs crew.

"(Commander) Pitt began a video that grabbed Hawke's attention and immediately transformed his mood. The PM appeared transfixed as he watched dramatic and brilliantly clear footage taken by HMAS Orion as it slipped in behind and beneath a surfaced Soviet Charlie-class nuclear submarine heading into the Vietnamese port.

The video began with distant pictures of the Soviet submarine motoring towards the harbour, well outside the 12-nautical mile (22.2km) Vietnamese territorial limit. The video was shot through a camera in Orion's periscope as the submarine loitered, barely submerged in the choppy sea.

Then Pitt took the Orion deep, ran in close behind the Soviet boat, and came up to periscope depth again. Now the video showed the Soviet submarine's wake boiling and bubbling on the surface. Hawke watched, startled, as a clear image of the turning propeller appeared on the screen just above and ahead of Orion.

Pitt ran beneath the Soviet submarine, filming sonar and other fittings mounted along its hull. The remarkably clear pictures exposed the underwater secrets of Charlie-class technology. The only other way to get them would be for a western spy to penetrate dry-docks in the Soviet Union.

Pitt positioned Orion ahead of and beneath the Soviet submarine, slowed almost to a stop, and then allowed the Soviet boat to pass him while he filmed the other side of its hull."
http://www.theaustralian.com.au/news/inquirer/cold-war-exploits-of-australias-secret-submarines/news-story/2b5a9a088125b1873777ec8cc60cd79b

Dear Is Mise,

Thanks for that. Bloody good read.

Dear Is Mise,

I second that.

Great read - Thank You.