What does Rule 32 mandate regarding vessels engaged in fishing?

Rule 32 of the COLREGs is explicitly focused on the conduct of vessels engaged in fishing, particularly outlining the requirements for their lighting and day shapes to ensure that they are clearly identifiable to other vessels. According to this rule, vessels engaged in fishing are mandated to exhibit the appropriate lights and shapes as specified in the regulations. This is vital for nighttime navigation and promotes safety at sea by helping other mariners recognize that a fishing vessel is at work.

Proper lighting and shapes are essential not only for the visibility of the vessel but also for the safety of all vessels in the vicinity, as it allows them to understand the operational status of the fishing vessel (for example, whether it is trawling or fishing with nets). This identification minimizes the risk of collisions, particularly in busy waterways or during periods of reduced visibility.

Other options, while they address relevant maritime conduct, do not pertain directly to what Rule 32 stipulates. Thus, the correct answer emphasizes the importance of proper lights and shapes for vessels engaged in fishing.