What is the primary use of DIFAR Sonobuoys?

DIFAR Sonobuoys, which stands for Directional Frequency Analysis and Recording Sonobuoys, are primarily designed to provide directional information regarding sound waves in the ocean, particularly for detecting and tracking submarines. These sonobuoys utilize a hydrophone that is capable of assessing the direction of underwater sounds, which is critical in anti-submarine warfare. By analyzing the frequency and direction of sound waves, military personnel can determine the location and movement of potential underwater threats.

The focus on sound directionalality is essential because it helps in locating and identifying submarines with greater accuracy. This capability enhances situational awareness and operational efficiency in naval operations.

In contrast, the other options do not align with the primary functions of DIFAR Sonobuoys. Detecting missile launches, tracking civilian flights, and transmitting GPS coordinates refer to entirely different systems and capabilities not associated with their core purpose.