What is the significance of the flashing yellow light on a vessel?

The significance of the flashing yellow light on a vessel is primarily to indicate that the vessel is moving at planing speed. When a boat reaches planing speed, it can lift out of the water and ride on top of the surface, which is typically faster and more fuel-efficient than operating at displacement speeds. The flashing yellow light serves as a communication tool to inform other vessels in the vicinity about the speed and maneuverability of the boat, enabling safe navigation and minimizing the risk of collisions.

Understanding this signal is essential for all boat operators, as it contributes to safer waterway management. The other interpretations, such as landing signals, warnings about shallow waters, or distress signals, correspond to different light configurations or colors, which is why they don’t apply to the flashing yellow light specifically.