What does the acronym RO refer to in the context of sonobuoys?

In the context of sonobuoys, the acronym RO refers to "Range-Only." This designation indicates that the sonobuoy is designed to provide information regarding the range or distance of detected underwater objects, such as submarines or other vessels. The operational focus on range is critical for naval operations, as it helps in determining how far the target is from the sonobuoy, facilitating accurate location tracking and tactical decision-making.

By concentrating solely on range, this type of sonobuoy minimizes additional functionalities and complexity, allowing for streamlined data collection and analysis. This function is essential in scenarios where precise distance measurement is crucial for effective engagement or evasive maneuvers. Understanding these operational capabilities of sonobuoys helps personnel utilize them effectively in maritime surveillance and defense missions.