How would one get a submarine to rise?

Asked by: Mike Burrell

How do submarines rise to the surface?

In order to control buoyancy, the submarine relies on special tanks that can be filled with water or air. To return to the surface, the tanks are filled with air. This makes the submarine less dense than the water around it, causing the sub to float to the surface.

How is it possible for a submarine to submerge or rise in water?

A submarine uses ballast tanks filled with compressed air and when needed the air is released and takes on water which increases the density making it sink but when the water is pushed out the sub’s density is decreased making it float.

How does a submarine rise and fall?

In submarines, this is controlled by ballast tanks. When the tanks are empty, the submarine has less mass and it floats like a normal ship. As water is allowed into the tanks, the mass of the submarine increases, the downward gravitational force on the submarine increases and the submarine begins to sink.

What keeps submarines from sinking?

As gravity pulls down on the ship; water creates an opposite upward force called buoyant force, which prevents the ship from sinking. Submarines use ballast and trim tanks, which are filled with air or water to submerge or raise the ship.

How long can submarines stay underwater?

The limits on how long they can stay underwater are food and supplies. Submarines generally stock a 90-day supply of food, so they can spend three months underwater. The diesel-powered submarines (not now used by the United States Navy) had a limit of several days submerged.

How do submarines not run out of air?

Oxygen is supplied either from pressurized tanks, an oxygen generator (which can form oxygen from the electrolysis of water) or some sort of “oxygen canister” that releases oxygen by a very hot chemical reaction.

How do submarines avoid underwater objects?

Ballistic-missile submarines are built to evade detection by making as little noise as possible. They move slowly—usually no more than 20 knots. They’re coated in anechoic tile, a rubbery substance that absorbs sound and prevents sonar detection. And nearly every moving part is isolated so that it won’t transmit sound.

How fast do submarines go?

There are established reports and manufacturer’s claims that would indicate two (or perhaps more) submarines are capable of speeds exceeding 30 knots (56 km/h).

How do people breathe in submarines?

Oxygen is supplied either from pressurized tanks, an oxygen generator (which can form oxygen from the electrolysis of water or by some other means) or some sort of “oxygen canister” (You may remember these canisters because of their problems on the MIR space station — they release oxygen by a very hot chemical

How deep can you go in a submarine?

A nuclear submarine can dive to a depth of about 300m. This one is larger than the research vessel Atlantis and has a crew of 134. The average depth of the Caribbean Sea is 2,200 meters, or about 1.3 miles. The average depth of the world’s oceans is 3,790 meters, or 12,400 feet, or 2 ¹⁄₃ miles.

How often does a submarine have to surface?

While old diesel submarines needed to surface in a matter of hours or a few days at best to recharge batteries, new AIP powered vessels only need to surface every two to four weeks depending on type.

Do submarines run out of compressed air?

A. It is true that air is released from the ballast tanks and water is let into them through special valves to enable a submarine to dive, but the sub does not get air back to surface again. It carries down tanks of compressed air that can be used to empty the ballast tanks of water.

Can you survive a tsunami in a submarine?

Some small and strong-hulled titanium submarines could survive stronger impacts and tsunami waves, but larger submarines with thinner hulls could be better adapted to long-term survival in a contaminated world.

Can you smoke on a submarine?

Everybody is aware that smoking is a legal, if harmful, stress reliever. So the Navy banned smoking aboard submarines not with the stated purpose of curing the smokers, but of protecting nonsmoking submarine crew members from the threat of heart and lung disease from secondhand smoke.

Has a submarine ever hit a whale?

How Do Submarines Dive and Surface?

How do submarines stay upright?

Unlike a ship, a submarine can control its buoyancy, thus allowing it to sink and surface at will. To control its buoyancy, the submarine has ballast tanks and auxiliary, or trim tanks, that can be alternately filled with water or air (see animation below).

Why do submarines float so low?

Quote from video: Between ships and submarines firstly most obviously there are huge implications in terms of buoyancy. And stability with a ship you just need to make sure the underwater part of your vessel. Displaces

How often does a submarine have to surface?

While old diesel submarines needed to surface in a matter of hours or a few days at best to recharge batteries, new AIP powered vessels only need to surface every two to four weeks depending on type.

How do submarines navigate under the sea?

Submarines carry an inertial navigation system, which measures the boat’s motion and constantly updates position. Because it does not rely on radio signals or celestial sightings, it allows the boat to navigate while remaining hidden under the surface.

Do submarines ever hit whales?

Most subs have two types of sonar: active and passive. Active sonar sends out acoustic sounds, or “pings,” which can reach thousands of yards. If the ping bounces back, that means it hit an object—like a whale, a ship, or another submarine.

What is the longest a submarine has stayed submerged?

111 days

The longest submerged and unsupported patrol made public is 111 days (57,085 km 30,804 nautical miles) by HM Submarine Warspite (Cdr J. G. F. Cooke RN) in the South Atlantic from 25 November 1982 to 15 March 1983.