What does the Kilo flag indicate when displayed on a vessel?

The Kilo flag, which is identified by a blue and white chequered design, is used internationally in maritime communication to signal that personnel are working over the side of a vessel. Displaying this flag serves as a warning to other vessels in the vicinity to exercise caution, as there may be individuals engaged in activities such as maintenance, repairs, or other tasks that could pose a risk if there is an unanticipated movement of the vessel or nearby traffic.

This flag plays a crucial role in ensuring safety on the water, as it alerts nearby vessels to be vigilant and potentially keep a safe distance, helping to prevent accidents that could arise from boats getting too close while personnel are working. Properly using maritime flags like the Kilo flag is an essential part of navigational safety and communication at sea, emphasizing the importance of adhering to international maritime signaling conventions.