What is a knuckle in submarine?

What is a knuckle in submarine?

The baffles is the area in the water directly behind a submarine or ship through which a hull-mounted sonar cannot hear. This blind spot is caused by the need to insulate the sonar array, commonly mounted near the bow, from the noise of the vessel’s machinery.

How does a submarine maneuver?

The submarine can steer in the water by using the tail rudder to turn starboard (right) or port (left) and the hydroplanes to control the fore-aft angle of the submarine. In addition, some submarines are equipped with a retractable secondary propulsion motor that can swivel 360 degrees.

Do submarines make bubbles?

Submarines make a ton of noise through their engines, propellers, and general operation. Cavitation bubbles form on the suction side of a propeller when the pressure of the water drops below the vapor pressure of water. As quick as the bubbles are produced, they almost just as quickly disappear.

How do you defend against torpedoes?

Torpedo defence includes evasive maneuvers, passive defense like torpedo belts, torpedo nets, torpedo bulges and active defenses, like anti-torpedo torpedoes similar in idea to missile defense systems.

Who invented the first submarine and how did it work?

While working for the French government in 1800, American inventor Robert Fulton designed the “Nautilus,” an-all metal craft often called the first modern submarine. The 21-foot ship featured several revolutionary innovations including a cigar-shaped hull and a copper conning tower.

What is the knuckle effect in a submarine?

Forma a “knuckle”. If a submarine is traveling fast enough and turns in a certain way, it can form a turbulent disturbance of water right behind it. This “knuckle” diffracts noise passing through it and temporarily “blinds” torpedoes using active sonar. Sail by another large vessel and hope the torpedo locks on to it instead of you.

Could nanotechnology be the key to submerged vessel stealth?

The Holy Grail of submarine stealth, however, remains a ‘cloaking device’ that would render submerged vessels invisible to sonar and, although the research is still in its early stages, it seems that nanotechnology may hold the key to turning this science-fiction staple into reality.

What happens when a submarine clears its baffles?

When a submarine clears its baffles, a pursuing submarine must take measures to avoid detection by, or worse, collision with, the submarine ahead.

Why did the Kursk turn to check behind a US submarine?

A US submarine stationed nearby was positioned to follow just such a Boomer. The idea was for the US sub to follow a short distance behind Kursk, where it should not be detected in Kursk’s wake. From time to time the Kursk would turn to check behind and the US sub had to quickly mirror the change of course.