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Underwater objects are usually tracked by means of the sounds given off by an object. For a submarine, sound is generated largely by its propellers as they churn through the water. However, the engines and some other parts also generate noise. These noises are detected by a submarine's sonar (sound detection and ranging equipment).
Objects can also be located by reflected sound waves, known as "active sonar". A "ping" or sound wave is generated into the water. Any differences in the returning sound indicates the location of an object or structure underwater. This technique can also be used to map the ocean floor.
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The reason submarines can detect other underwater objects is largely due to which?
Submarines have sonars.
The reason submarines can detect other underwater objects is largely due to?
Sonar. Active and passive
The reason submarines can detect other underwater objects is largely due to which what?
sound wavers are affected by propellers
What is the use of sonar?
SOund Navigation And Ranging = SONAR Sound is used underwater to bounce off objects. The reflections back can be measured (by electronics) to find our where they are and how far away. Used by submarines, to navigate round obstacles underwater and detect other vessels.
When is it echo considered as useful?
Echo is caused due to reflection of sound and it has major applications in SONAR, which is used by submarines or planes to detect other objects
How does sonar detect underwater objects?
Sonar is when you send sound waves out. They bounce off of objects, letting people know there is an object there. Dolphins and bats, among other animals, use sonar.
What did the us use before sonar?
Before sonar, the US used various acoustic detection methods, such as hydrophones and listening devices, to detect underwater objects and submarines. These methods relied on the amplification and interpretation of sound waves in water. Additionally, the US Navy also used other methods like visual observation and radar for above-water detection.
What is a torpedo?
A torpedo is a self-propelled underwater weapon with an explosive warhead. It can be launched by aircraft, ship, or submarine, against surface vessels or submarines. Torpedoes use monopropellants (e.g., Otto Fuel) as engine fuel, which has its own oxidizer, since there isn't any oxygen to sustain a combustion engine underwater otherwise.
What is a sonar used for?
Sonar is used to detect other vessels or ships/submarines through a tube-like device> Andrea
The reason submarines can detect other underwater objects is largely due to what?
Submarines use sonar to detect other things in the water. Sonar is an acronym for sound navigation and ranging, but there is a bit more to this. Submarines use what is called active sonar and passive sonar. We need to look at it in a bit of detail to see what's up.Contemporary submarines have a active sonar system aboard. This system emits "pings" into the water, and the pings are bursts of sound energy. The sound energy propagates through the water, bounces off things around the submarine, and then returns to the submarine to be picked up and listened to. By "pinging" on things, the submarine can develop a profile of sorts of things around it. The bottom is down there, and there's another submarine over there. Something like that. But active sonar means you can be heard a long way away. Farther away than you can effectively "see" other submarines with that active sonar. Other submarines can "hear you coming" because you are pinging, and can do this before you can hear then with the returned pings. That's bad for the submarine using active sonar.Modern military submarines operate in water that is fairly deep. This means that the submarines don't generally have to worry about hitting anything under the water. As they on patrol, they are listening for other things in the water using their passive sonar array. This array uses the hydrophones to listen to the sounds in the water. These sounds are being made by other ships, other submarines, schools of fish, whales, or whatever else is making "noise" in the water. This is the primary method used by the current military submarines to locate and track other things in the water with them.
How do submarines see underwater?
On or near the surface, submariners 'see' through a periscope mast raised through the fin above the hull from within the submarine's Control Room. In the very latest submarines, the extendable periscopes will be largely superseded by an electronic mast that uses a camera and displays the picture on a monitor. The optronics masts have a closed circuit television (CCTV) camera to use by day or a thermal imaging (heat seeking) camera for use at night or in bad visibility. Submarines cannot see underwater and so use sound energy to detect obstacles and objects. When under the water the submarine can emit SONAR (SOund Navigation and Ranging) sound waves through the water (know as 'pinging'). The sound wave or sonar ping echo is bounced back to the submarine if it detects another vessel or obstacle. The strength of the returned signal or sound provides an indication of the range (distance) between the submarine and the other vessel (ship or submarine) or obstacle. Modern submarines have excellent radio and satellite reception and communications systems and underwater telephones. When sending out sound waves by sonar, a submarine could be detected by another ship or submarine. When wishing to remain undetected, a submarine will listen for and hear sounds underwater through hydrophones (underwater microphones).
What underwater detection devices are used in the military?
underwater listening devices the navy uses sona bouys which is an active systems that is place in a pattern where suspected submarines are, they are launched out of a p3-orion or an S3-viking, also they have a system of underwater microphones called the sousis (maybe not the correct spelling) but it monitored 24/7. Also, most ships and submarines in the Navy have passive SONAR (listen only mode) as well as active (send a sound, then listen for the return) to detect what is near them in the water. The advantage to using passive, is that if you can keep your own ship quiet enough, the other vessel may not know that they have been detected.
