What are the primary methods for detecting a target?

The primary methods for detecting a target are based on their effectiveness in various environments and conditions. RADAR (Radio Detection and Ranging) and SONAR (Sound Navigation and Ranging) are widely used technologies due to their ability to operate over great distances and through various mediums. RADAR is effective in air and space, using radio waves to detect the position and speed of objects, making it invaluable for tracking aircraft and missiles. SONAR, on the other hand, utilizes sound waves in water environments to locate submarines and underwater obstacles, which is essential for naval operations.

These methods provide reliable detection in conditions where visual observation may not be possible, such as during poor weather or at night for RADAR, or underwater for SONAR. The versatility and reliability of RADAR and SONAR make them primary choice methods for target detection in military and naval operations.

Other methods listed, like visual signals, have their use but rely heavily on favorable conditions and are limited in range. Magnetic and chemical sensors may serve specific applications, especially in certain environmental contexts or for detecting specific types of targets, while infrared and ultraviolet detection focus on particular wavelengths of light and can be useful in specific scenarios, such as surveillance in low visibility conditions. However, these methods do not match