- These submarines were used in both World War I and World War II. In 1954, the US Navy used the first nuclear-powered submarine. It was named the USS Nautilus. How Does a Submarine Submerge? Air is used in ballast tanks to keep submarines at surface level. During submersion, the valves on the ballast tanks are opened.
- Sylvia Earle: Here's how to protect the blue heart of the planet on TED (technology, entertainment, design). If you haven't visited TED, which features talks.
Submarines also typically have a vertical structure that houses sensing devices, periscopes, and communications devices. This vertical structure is called a “sail” in the United States and a “fin” in Europe. Additionally, there is a propeller at the rear and several hydrodynamic control fins. Today, the US Navy has 66 submarines and every single one is nuclear powered. The fleet consists of 34 Los Angeles-class attack subs, 18 Ohio-class missile submarines, 3 Seawolf-class attack submarines, and 11 Virginia-class fast-attack subs. Early Soviet-designed submarines are still used to this day all around the world.
Here’s a question that you don’t hearvery often; if a submarine and a whale collided, who would emerge victoriously?The answer to that is not definite because such an incident has not occurred sofar. However, back in 2005, the USS San Francisco did collide with a seamountat full speed. You can see the damage the collision caused in the picturebelow.
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The USS San Francisco had a total of137 men aboard out of which 98 were injured, and one died. The USS SanFrancisco lost her forward ballast tanks but was still able to surface and thentravel for 360 nautical miles using her own power. The bow of the USS SanFrancisco was replaced using the bow of the recently decommissioned USSHonolulu and remained in active service up until 2016 when she underwentconversion to a training ship.
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A whale would not have survived sucha collision since it would have been enough to inflict injuries that wouldprove fatal. On the other hand, if such a collision would cause fatalities onthe submarine; let’s hope we never have to find out. Rest assured, the whalesare good at getting out of the way of submarines, and that is why no suchcollision has taken place until now.