2D Active Sonar: Ping Propagation & Echo Ranging

What Active Sonar Is

Active sonar involves emitting sound waves into the water and listening for echoes that bounce back from objects. These pings are crucial for detecting submarines, schools of fish, or even seamounts in the ocean.

The 2D active sonar simulation accurately models this process by showing how each ping propagates as a circular wavefront at a speed of 1500 meters per second.

How Ping Propagation Works

Ping propagation in water follows the laws of physics, where sound waves travel in straight lines until they encounter an object. Upon reflection, these waves return to the sonar device with a delay proportional to the distance traveled.

The simulation demonstrates this by showing how pings expand as circular wavefronts and how echoes are received based on their round-trip time.

Echo Ranging and PPI Display

Echo ranging is the process of measuring the time it takes for a sonar ping to return, which allows for determining the distance to an object. This principle forms the basis of the PPI (Plan Position Indicator) display in the simulation.

By overlaying true object positions, the simulation verifies the accuracy of the range and bearing calculations based on echo timing.

Factors Affecting Sonar Performance

Several factors can affect sonar performance, including water temperature, salinity, and pressure. These conditions influence sound speed and absorption, which in turn impact ping propagation and detection range.

The simulation allows users to adjust ping power and time scale to explore how these variables affect the effectiveness of sonar detection.

Frequently asked questions

Try it live

Everything above runs in your browser — open 2D Active Sonar — Ping Propagation & Echo Ranging and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.