Underwater ship means submarine, submarine?

Wrong, it means the boat that is under the water.

Submarine submarine

The safe diving depth is the diving depth that should not be exceeded when the submarine is working normally and safely according to the design, with a margin.

The maximum depth = the ultimate depth, the name is different, it is naturally to compress the design margin above, although the maximum depth that can be reached has been tested during the test, but at this depth is a last resort, the ship will be deformed, and the equipment will be damaged.

If you don't want to die, in fact, the ultimate dive depth can still be exceeded a little, and the depth of the submarine will not be measured during the test, so there is still a bit of leeway between the extreme dive depth and the official crushing. Of course, it was a new ship at the time of testing, and it is possible that it will be damaged after years of use, or if it is damaged in battle, and it will be broken before it reaches the ultimate depth.

A certain degree of deformation actually starts after the pressure is high, the structure is squeezed, and it is okay if it is within the design range. If it is exceeded, there will be irreversible deformation, which needs to be repaired and replaced.

All kinds of mechanical and electrical failures, fire and water leakage in the boat can not be suppressed, crew mutiny, etc., all kinds of situations.

You can understand the class as a technology or platform model, a model of ** generally will not build only one, no matter how many are built, the name of the first ship of this model of ** earliest launch equipment will often become the name of this model**, for example, the United States Nimitz-class aircraft carriers have built a total of nearly ten, they are all based on the same platform, the first launch of this class is equipped with the Nimitz, so all aircraft carriers of this model, no matter what the name of the ship is, All are known as one of the Nimitz-class ships.

** A certain class, equivalent to a technical model, the technical performance of the various ships in the first class is not much different, such as the United States Nimitz-class aircraft carrier, a total of 10 ships in the first class, all nuclear-powered, displacement of 90,000 tons to 100,000 tons, named after the first ship Chester W. Nimitz This class of aircraft carriers, Europe and the United States are named after the first ship as the name of the class.

Of course.

Definition of ship: A general term for a ship, a water vehicle, propelled by manpower, wind or machinery. Some can be navigated underwater, such as submarines; There are also moored and unsailing, such as barges. ......

A boat that can dive into the water

The world's first manned submarine was the American Robert Fulton, who built a submarine called the Nautilus for France in May 1801, and Verne published "Twenty Thousand Leagues Under the Sea" in 1869. It can be said that Verne borrowed Fulton's idea.

In history, it was not only submarines that were called "Nautilus", but many ordinary warships were also called by this name. But the naming of the first nuclear submarine does have the meaning of commemorating Verne, because there has never been a submarine in history as described in **, and only a nuclear submarine can realize the dream in **.

It is rare for a submarine to be able to dive to a depth of 20,000 miles, you mean that it is not difficult to dive for 20,000 miles!

Submarines of World War I and World War II were observed through periscopes at a depth of about 10 meters.

Submarines now can be observed both through periscopes and directly through active and passive sonar systems. The American Wave-class nuclear submarine is also equipped with a foldable small UAV, which can dive from a depth of twenty or thirty meters underwater, and this UAV can detect and monitor in a certain airspace.

At present, there are only these three known, and there are many in research and development.

Periscopes are generally used at a depth of about 10 meters. Early submarines have poor sonar and underwater navigation capabilities, so they are generally in a state of surface navigation and dive after discovering the target. The ability of the submarine itself to obtain intelligence is very poor, and it is the same now, so external briefing is very important for submarines, of course, now there is radar, sonar is much better than in the past, there was a periscope in World War I, and the principle of taking things is very simple.

Submarines cannot "see" under water

Targets can only be spotted by sonar.

Among them, active sonar is that the submarine emits sound waves and relies on echoes to detect the target, so it is easy to expose itself to passive sonar is to listen to the surrounding sounds.

Displacement is an important indicator used to indicate the size of the ship, and it is the quality of the water discharged when the ship is fully loaded with cargo according to the design requirements. Displacement is usually expressed in terms of tonnage, which is the tonnage of water discharged by a ship in water.

1: The standard displacement is the weight of all kinds of equipment required, ammunition, all crew, fresh water, food and other necessities, etc., without the weight of fuel oil and boiler water, it cannot be sailed.

2: Normal displacement: This is the design displacement. On the basis of the standard displacement, according to the weight of 50 oil and boiler reserve water, lubricating oil. At this time, the ** can be tested.

3: Full load displacement: that is, the total weight of all fuel, lubricating oil and boiler reserve water on the basis of standard displacement, and when it is fully loaded.

1. What is displacement? Refers to the volume of water discharged by the hull of a boat (submarine) in the water, below the waterline (water surface).

2. The displacement is calculated by tonnage, usually with 4 as the standard value. Each cubic meter of water is one ton.

3。The displacement of a ship indicates the size of the ship.

For example, if a basin of water is filled with an empty bottle and floats on the water, the overflowing water is the displacement of the bottle (no-load displacement). Put in a bottle containing an object and surface it, and the overflowing water is the displacement of this bottle (full load displacement). Put in a bottle with an object and sink to the bottom, and the overflowing water, is the displacement of this bottle (submarine displacement).

Resources.

1. Displacement is an important indicator used to represent the size of the ship, usually with 4 as the standard value. Each cubic meter of water is one ton.

2. Displacement is usually expressed in tonnage, and the so-called displacement tonnage is the tonnage of water discharged by ships and ships in the water. The larger the displacement, the larger the hull, and the more personnel and equipment can be loaded and carried.

3. For submarines, the displacement is divided into two types: surface displacement and underwater displacement. For surface ships and merchant ships, only the no-load displacement and the full-load displacement are usually indicated.

4. There is an unloaded and fully loaded waterline on the hull, which corresponds to the no-load displacement and full-load displacement of the hull respectively, and when the hull full-load waterline is flooded, the ship is in danger of overloading and capsizing.

I would like to correct here that submarines generally do not have a standard displacement statement, because submarines are not surface ships, and the internal compartments are very crowded and cramped, and there is no space to carry excess personnel and cargo.

The water displacement of the submarine is the displacement of the submarine after it floats, and the underwater displacement is the displacement of the submarine after it is completely submerged in the water. Although the submarine looks very big from the outside, in fact, the big ones are only the two large water tanks of the submarine, and if you peel off the water tank and the shell of the submarine, the submarine is actually a large steel pipe with a diameter of about five to eight meters. Inside, there are all kinds of huge machinery and equipment, torpedoes, and dense pipes, circuits, and countless valves, and dozens of big men have to eat, drink, and sleep in it, and the environment can be imagined to be crowded and oppressive.

Displacement is an important indicator used to express the size of the ship, which refers to the weight of the same volume of water discharged by the ship in the water. According to Archimedes' principle, the buoyancy experienced by an object in water is equal to the weight of the water it discharges, that is, the weight of water with the same volume as the hull immersed in the water, which is the displacement of the ship. The following formula can be obtained:

Displacement (buoyancy) = the weight of the ship itself + the weight of the cargo when fully loaded (gravity = buoyancy). Displacement is usually expressed in terms of tonnage, which is the tonnage of water discharged by the ship in the water, and the tonnage of the ship's own weight.

The standard displacement includes hull, machinery, equipment, personnel, ammunition, provisions, fresh water but does not include fuel oil, lubricating oil, and boiler water.

Normal displacement, which is the standard displacement plus half of the fuel oil, lubricating oil, backup boiler water, etc.; It is mainly the state at the time of the factory navigation test.

Underwater displacement is the weight of the watertight volume of the hull when the submarine is in the underwater state. The value is equal to the sum of the normal displacement on the water and the total weight of ballast water in all main ballast water tanks. It is one of the important raw data for calculating the hydrostatic performance of submarines.