Can a submarine see another submarine?

A submerged submarine can use either active or passive sonar to detect other subs. However doing so would also broadcast the submarine’s position to anyone else who is listening.

How do submarines find other submarines?

Military ASW employs technologies such as magnetic anomaly detectors (MAD), which detect tiny disturbances to Earth’s magnetic field caused by metallic submarine hulls, passive and active sonar sensors that use sound propagation to detect objects underwater, as well as radar and high-resolution satellite imagery to …

What is the range of submarine sonar?

Active sonar pulses can be transmitted at four frequencies (6.5 kHz, 7.5 kHz, 8.5 kHz, and 9.5 kHz) and can operate for up to one hour at depths of up to 457 m (1,500 ft). The echo returns of the active sonar signals provide range, bearing, and Doppler information on acoustic contacts.

How far away can submarines hear?

while sat underwater in the English channel. She cost around £1billion to build, has sonar so sensitive it can hear other vessels 3,000 miles away and carries a giant payload of 38 deadly Tomahawk cruise missiles.

How do submarines stay undetected?

A submarine can “hide” under a layer of cold water where an active hull-mounted sonar (HMS) can’t reach since the sound wave will bounce off the layer up against the surface. For this reason, surface ships have variable depth sonars (VDS) that they can dip below the layers and search.

How far can passive sonar hear?

These sound waves can travel for hundreds of miles under water, and can retain an intensity of 140 decibels as far as 300 miles from their source.

Can ships detect submarines?

The submarine can hear a surface ship long before the surface ship can detect the submarine, and therefore it can take evasive action before its detected. Because of water physics, sound is the most effective way to detect a submerged submarine.

Why sonar is not used in air?

Whereas sonar can be both passive and active. You can listen to sounds made by other subs’ propulsion without giving away your position. Sound travels very fast in water compared to air, so you can hear things at distance in near real-time. It is also easier to measure the doppler effect with sound than radio.

How does sonar detect underwater objects?

A Sonar is a device that uses sound waves to detect objects. A Sonar detects these objects by emitting ultrasonic waves into the sea and detecting the reflected echoes. The Sonar can detect and display the distribution, density, and movement of a school of fish at an angle of 360° or 180° in all directions.