What is a possible situation that may still have a risk of collision?

The risk of collision can be heightened when approaching a large vessel or a towing vessel due to several inherent factors. Large vessels often have significant blind spots and a restricted ability to maneuver quickly, which can create challenges in ensuring both vessels maintain a safe distance. The sheer size and weight of these vessels mean they require more time and distance to stop or change direction effectively. Additionally, there may be a lack of visibility due to the vessel's superstructure and load, making it difficult for the smaller vessel operator to ascertain the large vessel's intentions or navigational moves. Towing vessels, in particular, may be restricted in their ability to alter course because of the tow they are managing, which further complicates the interaction.

In contrast, when approaching a small recreational vessel or passing another vessel at a safe distance, the likelihood of collision is greatly reduced, as the operators of smaller vessels can often maneuver more easily and may have better visibility. Navigating in a crowded harbor does entail challenges as well, but it involves multiple vessels; the situation would require vigilance from all operators involved to mitigate risks. However, the specific dynamics involved with larger vessels create a pronounced risk of collision that necessitates careful navigation and situational awareness.