What does the term 'vessel restricted in her ability to manoeuvre' refer to?

The term "vessel restricted in her ability to manoeuvre" specifically refers to a vessel constrained by the nature of her work. This classification is important under the International Regulations for Preventing Collisions at Sea (COLREGs). Examples include vessels engaged in underwater operations, dredging, or laying pipes, which significantly limit their maneuverability.

When a vessel is performing such tasks, it may not be able to alter its course or speed in the same way that a typical ship would. This condition requires other vessels to give way and take special considerations when navigating near or around these limited-manoeuvring vessels to prevent collisions and ensure safety on the water. The correct identification of these vessels is crucial for effective maritime navigation and the prevention of accidents.