Which type of buoy is typically deployed for underwater surveillance?

The answer encompasses the various types of buoys that can be utilized for underwater surveillance. Each type has its unique functions and capabilities that play a role in gathering data from underwater environments.

Passive buoys are designed to listen for sounds within the ocean, such as marine life or other vessels. They rely on the natural acoustic signals in the underwater environment and are primarily used for monitoring and surveillance without actively emitting any signals themselves.

Active buoys, on the other hand, emit signals and listen for their echoes. This allows them to determine the distance to objects and gather more detailed information about their surroundings. They are effective for tracking and detecting underwater objects or activities.

Special purpose buoys can be tailored for specific missions or operations. These might include advanced technology for particular surveillance tasks, making them versatile for various underwater applications.

The combination of these buoy types allows for a comprehensive approach to underwater surveillance, addressing different aspects of monitoring and data collection in aquatic environments.