What type of vessel must exhibit the same lights at night as a RAM vessel?

A vessel engaged in dredging must exhibit the same lights at night as a RAM (Restricted Ability to Maneuver) vessel because it operates under circumstances that can limit its ability to maneuver, similar to vessels that are restricted in their movements due to their operations. RAM vessels, which include those that are engaged in certain activities such as dredging, laying pipelines, or servicing buoys, are required to display specific lights to ensure they are easily identifiable to other vessels.

By displaying the same lights as a RAM vessel, a dredging vessel communicates its restricted ability to move freely in the water, which is vital for maintaining safety and preventing collisions. These lights include red and green sidelights as well as a white stern light and, in some configurations, additional all-round lights.

Understanding the signaling mechanisms in place for such vessels is crucial for navigation safety, as other vessels must interpret these lights accurately to make safe navigation decisions when encountering these types of vessels on the water.