What is the main consideration for all vessels in sight of one another according to the COLREGs?

The main consideration for all vessels in sight of one another, according to the COLREGs, is the avoidance of a collision. This fundamental principle is at the heart of the regulations, as they were specifically crafted to ensure safety at sea and prevent maritime accidents. When two vessels are in sight of each other, they must take appropriate actions to safely navigate and avoid any potential collisions.

The avoidance of a collision emphasizes the need for vigilance, effective communication, and proper maneuvering in close quarters. It highlights the responsibility of each vessel's master to assess the situation, consider trajectories, speed, and distance, and act accordingly to prevent an accident.

In contrast, factors such as vessel size, type, or intentions are important in determining how each vessel should act, but they do not override the primary responsibility of avoiding collisions. The COLREGs prioritize safety above all else, making the avoidance of collision the essential consideration when vessels are in sight of each other.