What should every vessel do to determine the risk of collision?

The requirement for every vessel to determine the risk of collision is articulated in the COLREGs, specifically in Rule 7, which emphasizes the importance of assessing the situation by utilizing all available means that are appropriate to the circumstances. This holistic approach encompasses a combination of visual observations, radar, AIS (Automatic Identification System), and other navigational aids.

Using all available means is crucial because different situations may require different tools for effective risk assessment. For example, in poor visibility conditions, relying solely on visual observations would be inadequate and could compromise safety. Similarly, while radar can provide valuable information, it should not be the only tool used, especially since it may not detect every type of vessel, particularly smaller or non-mechanical ones.

In addition, understanding traffic patterns, including unusual ones, is essential for safe navigation. Recognizing these patterns helps in making informed decisions about potential collisions. By employing all available methods, a vessel can enhance its situational awareness and make timely maneuvers to avoid collision risk.