What should a vessel do if necessary to avoid a collision?

When a vessel is confronted with the possibility of colliding with another vessel, the primary consideration is to avoid the collision safely and effectively. Slacking speed or stopping propulsion is the correct action to take as it reduces the vessel's momentum, allowing better control and more time to assess the situation. This strategy is consistent with the fundamental principle of COLREGs, which emphasizes the importance of taking proactive measures to avoid collisions.

By reducing speed or stopping, the vessel can prevent a dangerous situation from escalating. It allows the operator to evaluate other options that might be necessary to avoid a collision, such as altering course. This is vital, especially in busy waterways or during poor visibility conditions where immediate actions can prevent accidents.

Maintaining speed regardless of the risk ignores the potential dangers posed by other vessels and does not align with safe maritime practice. Ignoring the proximity of other vessels or relying solely on verbal warnings also does not address the immediate need for action. Therefore, slowing down or stopping is the most prudent and responsible course of action in this scenario.