What lights are required for an 8 metre vessel engaged in diving operations?

For a vessel engaged in diving operations, such as an 8-meter vessel, the requirements for lights are specifically delineated to ensure visibility and safety in maritime navigation.

The correct answer specifies that three all-around lights in a vertical line are required. This arrangement consists of one light at the top, which is the white light signifying that the vessel is engaged in diving operations. The additional two lights below are used to enhance visibility and ensure that the signal is clearly recognized from all angles. By having the lights arranged vertically, they stand out more effectively against the background, making it less likely for other vessels to mistakenly approach the area where diving is taking place.

These visual signals are critical in alerting other vessels of the presence of divers underwater, allowing them to navigate safely around the diving area and protect those engaged in the diving operations. Therefore, three all-around lights in a vertical line are essential for compliance with navigational safety regulations under the COLREGs, especially for vessels engaged in work that poses risks to both the crew conducting the work and other vessels nearby.