If the situation allows, what is the ideal time frame for making an alteration of course?

The ideal time frame for making an alteration of course is well before a potential close-quarters situation. This approach allows for greater reaction time and clarity in decision-making, reducing the risk of collision. By altering course early, a vessel can establish a safer distance and ensure that the other vessel is aware of its intentions, which helps in avoiding confusion.

In maritime navigation, preemptive action is essential for maintaining safety at sea, especially in congested or confined waters. Making alterations early can provide additional time for the crew of both vessels to respond appropriately and adjust their navigational strategies, thereby enhancing overall safety.

Choosing to wait until the last moment before a potential collision, assessing the other vessel's actions, or moving immediately without a thoughtful approach may lead to hasty or poorly considered decisions, increasing the likelihood of misunderstandings or accidents.