What color signal on the SDU-39N is used by SAR to communicate with a swimmer?

The correct color signal used by Search and Rescue (SAR) teams on the SDU-39N to communicate with a swimmer is blue. The blue signal is specifically designated for use in highlighting a swimmer's location and ensuring safe and effective communication during rescue operations.

This color is readily distinguishable from other signals and can be easily recognized in various conditions, making it an ideal choice for signaling in emergency situations. It serves an essential function in water rescues, helping to coordinate and enhance the safety of operations involving swimmers in distress or in need of assistance.

Understanding the specific meaning behind the color coding used in rescue operations is crucial for effective communication between SAR teams and swimmers, ultimately leading to a more successful rescue mission.