If an inconspicuous partly submerged object measuring 20m wide and 80m long is being towed, what lights are required?

In the scenario of a partly submerged object that is 20 meters wide and 80 meters long being towed, the correct requirement involves the need for specific lighting to ensure visibility to other vessels, thereby enhancing safety on the water.

According to the COLREGs, a towing vessel must display specific lights to indicate its presence. For a partly submerged object, the regulations state that when being towed, it must exhibit one all-round white light at each end of the object. This is crucial for alerting other vessels to the dangerous presence of the tow and ensuring they can navigate safely around it.

Using an all-round white light at each end provides sufficient coverage for visibility from various angles, especially during low-light conditions like nighttime or in fog. The requirement for these lights is based on the size of the object being towed, as larger dimensions necessitate more clearly defined lighting to alert passing traffic, thus preventing potential accidents.

The other options are inadequate for this scenario. For instance, two all-round white lights alone do not convey the necessary information about the dimensions and position of the tow effectively. Similarly, stating that no lights are required or suggesting just one all-round green light does not align with the regulations, as these would fail to meet the visibility and