In radar terminology, the term "echo" refers to __________.

The term "echo" in radar terminology specifically refers to the signal that is returned from an object after it has bounced off that object. When a radar system transmits a signal, it travels outwards until it encounters an object, such as a ship, landmass, or other obstruction. Upon hitting the object, part of the signal is reflected back towards the radar antenna, creating what is known as an echo. This returned signal is crucial for radar systems to detect and locate objects, as it contains information about the object's distance, size, and sometimes even speed.

Understanding this concept is essential for interpreting radar data effectively. For example, the time it takes for the echo to return can be used to calculate the distance of the object from the radar source. This interaction of transmission and reflection is fundamental to radar technology and its applications in navigation and vessel traffic monitoring.