Once detected, a sub's relatively slow speed and lack of defensive firepower make it a sitting duck, especially from air attack. The anti-submarine weapons of today mean that there is only a slim chance for an exposed vessel to escape. For this reason, silence is taken to fanatical levels of engineering. The USA's best ballistic missile submarines have been compared to 'black holes in the ocean' and have reputedly never been successfully tracked by opposing forces. All images courtesy US Navy Silence is a sub's best friend.
Local conditions change a sub's acoustic signature.
A noisy sub will be neutralised long before it gets close enough to attack. All rights reserved.