What kind of light must be exhibited by a WIG craft in flight near the surface?

A WIG (Wing-in-Ground) craft, when in flight near the surface, is required to exhibit a high-intensity all-round flashing red light. This specific lighting protocol is essential for ensuring the visibility of the craft to other vessels and aircraft in the vicinity. The high-intensity aspect of the light is particularly important because it enhances the recognition of the WIG craft, which might otherwise be confused with other types of vehicles.

Furthermore, the choice of a red light is significant in maritime navigation, as red is universally recognized as a cautionary color, alerting others to the presence of the craft. The combination of being all-round and flashing adds to the visibility and awareness among other operators, reducing the chances of a collision or mishap.

In contrast to other lighting options mentioned, such as a steady white light, which is more common for different types of vessels, or other colors that don’t convey the same warning, the requirement for a high-intensity all-round flashing red light provides clear communication of the craft's presence and operational status, adhering to safety regulations and helping to avoid accidents.