What anchor shape or lights are shown by a vessel engaged in dredging?

A vessel engaged in dredging is required to display specific lights and shapes to indicate its activity. When a vessel is operating in this capacity, it does not show general anchor lights and shapes, as dredging is considered a different operation than simply anchoring.

The absence of anchor shapes or lights is consistent with the regulations that state vessels engaged in dredging should indicate their work status and any restrictions on navigation rather than displaying the standard anchor lights associated with anchored vessels. This distinction is crucial for other vessels navigating nearby, as it ensures that they understand the operational status of the dredging vessel and can act accordingly to avoid collisions or misunderstandings about the nature of the vessel's work.

In summary, a dredging vessel is not considered to be at anchor and thus does not exhibit anchor lights or shapes, reinforcing why the choice indicating 'no anchor shapes or lights' is the correct interpretation of COLREGs regulations for such vessels.