When is a vessel required to exhibit a special flashing light?

A vessel is required to exhibit a special flashing light when it is being pushed ahead as a means of indicating its status and alerting other vessels to its presence. This requirement enhances safety and visibility, particularly in situations where the vessel's maneuverability may be compromised or its length unclear, such as when it is not under its own power but rather being towed or pushed.

In this case, exhibiting a special flashing light helps other navigators understand that the vessel is in a specific operational condition and can assist in preventing collisions or other dangerous situations on the water. This is especially crucial in busy waterways or during periods of limited visibility.

In contrast, while a vessel at anchor may display certain lights to indicate its presence, a special flashing light is not typically required. Similarly, while vessels in narrow channels must adhere to various navigational rules, the requirement for a special flashing light specifically pertains to vessels being pushed ahead. While conducting sea trials may involve various signaling practices, it does not mandate the same flashing light requirement as being pushed ahead.