Vessels engaged in dredging must display what similar lights as?

Vessels engaged in dredging are considered to be "Restricted Ability to Maneuver" (RAM) vessels when they are operating in a manner that restricts their ability to deviate from their course. This designation is important because it informs other vessels of the dredging operation's limitations and helps prevent collisions.

RAM vessels must display specific lights and day shapes to signal their status to other vessels. Typically, they will show a combination of lights including two all-round red lights displayed vertically, and when they are engaged in dredging, they will also often display additional lights, such as a white flashing light or specific day shapes, to clearly communicate their operational state.

This requirement for displaying similar lights to RAM vessels is central to maintaining safe navigation and ensuring that other mariners are aware of the ongoing activity that affects navigability. Understanding the lights and signals required for various types of vessels is crucial for both safety and compliance with maritime regulations.