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Submarines
Submarines are naval craft that can operate for an extended period of time underwater. They are used primarily as warships, as well as for business, scientific and other purposes. Submarines are different from submersibles, which only have limited underwater capability.
2,056 Questions
How the first submarine changed society?
Submarines can pump sea water into or out of ballast tanks, if they wish to change their weight (of course, anything that enters or leaves a submarine
Can sonar use in periscope depth?
Yes sonar can be used at periscope depth. Surface ships also have sonar arrays on them. They are usually used to detect submarines.
That is a ballast tank used to alter the angle of the submarine up or down
How long can a submarine travel on battery power?
Diesel subs can probably run somewhere between 4 hours and 2 days. I hope someone can give a much more precise measurement, but that information may be classified. The answer also depends on what sub, and who it belongs to. Also, the battery cells can wear out over time, so the range decreases until they are replaced.
What are the forces acting on a submarine travelling at a constant depth?
When a submarine is traveling at a constant depth, the primary forces acting on it are buoyancy, gravity, drag (or hydrodynamic resistance), and thrust. The buoyant force, which acts upward, is equal to the weight of the water displaced by the submarine, while gravity pulls the submarine downward. For the submarine to maintain a constant depth, these forces must be balanced, meaning the buoyant force equals the gravitational force. Additionally, the thrust generated by the submarine's engines must counteract the drag force to maintain a steady speed.
What is dimension of the submarine?
The dimensions of a submarine can vary widely depending on its type and purpose. For example, a typical military attack submarine like the U.S. Navy's Virginia-class is about 377 feet long and approximately 34 feet wide, with a displacement of around 7,800 tons when submerged. In contrast, smaller research submarines may be significantly shorter and lighter. Overall, submarines are designed to be streamlined for underwater navigation and can range from small manned submersibles to large military vessels.
How many people are required to run a nuclear submarine?
It depends on the size and type of boat, but in general, between 90 and 130 officers and crew.
How is pressure used in the control of a submarine's ability to dive?
The process of a submarine to move from the surface of the ocean to a position underneath the surface is called a dive. This is accomplished by allowing water to fill the tanks of the submarine, the heavy water pressure now inside the vessel now will force it to sink below the surface, thus a "dive".
Why does submarines have to go under water?
Submarines are built with a special design that allows them to be faster underwater. Submarines can be used during a war as a way to sneak up to enemy lines in the water, but still stay hidden.
How are nuclear submarines heated?
Heating isn't really a problem, as there's enough heat from just about every operational system aboard that's turned on. The engineering spaces alone can reach above 120° F if the ventilation and AC is off.
Every major system, from the engineering systems, all electronic systems, even the galley ovens and stoves generate heat. The real problem is keeping everything cool, and for that reason the boats are cooled by huge AC systems and fans that run throughout the ship.
During a casualty drill, the fans are turned off (e.g., to deny the spread of smoke or contaminants from a fire), and you find out very quickly just how much heat is being produced by all the onboard systems.
The only real spot in the ocean where it gets a bit chilly is in the Arctic, where the water temperature is a constant 28° F. But there's always a nice comfy fan blowing heat from some equipment to warm you up.
Is submersible Alvin a manned or unmanned submersible?
Alvin (DSV-2) is a manned submersible, built by Litton Systems and commissioned in 1964 for the U.S. Navy. It is owned by the U.S. Navy, and currently operated by the Woods Hole Oceanographic Institute.
It is tended by and launched from the R/V Atlantis(AOGR-25), which was acquired by the Navy and is under lease to Woods Hole for Alvin's operations.
Alvin was named for its chief inspiration and creative developer, oceanographer Allyn Vine.
What are the primary missions of submarines in the US Navy?
1. Peacetime engagements
2. Surveillance and Intelligence
3. Special Operations
4. Precision strikes
5. Battle group operations
6. Control of the sea
What were used to destroy submarines in ww1?
Essentially the same weapons used in WWII through modern times; depth charges (first successfully used in 1916 against the German U-boat U-68), harbor mines, torpedoes, aircraft bombs, and torpedoes.
The only thing that has really changed from those days is that torpedoes can be launched from helos or aircraft (e.g., P3 Orion ASW plane), and surface warships of the U.S. Navy carry the ASROC, which is a rocket propelled depth charge with a high-yield warhead (conventional or nuclear). The submarine equivalent, since discontinued, was SUBROC, also a rocket propelled nuclear depth bomb, launched from a standard torpedo tube.
What is an shot from a submarine called?
A shot fired from a submarine is commonly referred to as a "torpedo launch." Torpedoes are self-propelled weapons designed to travel underwater and strike targets, typically ships or submarines. Submarines can also launch missiles, but these are categorized separately from torpedoes.
Does the National Guard have submarines?
No the National Guard does not have submarines. The National Guard is primarily a ground fighting organization. The Air National Guard does provide for air support within the US.
PERISCOPE
Who was first mechanical engineer in India?
David Bushnell (1742-1824) - Creator of the Turtle, credited as the first military submarine
