When may a vessel use all available means to avoid a collision?

The option indicating that a vessel may use all available means to avoid a collision when a risk of collision exists is correct because it aligns with the fundamental principles outlined in the COLREGs. According to Rule 2, vessels are required to take action to avoid collisions when they perceive a situation that may lead to one.

The essence of this rule emphasizes that the safety of navigation is paramount. When a risk of collision is identified, whether due to the proximity of other vessels or environmental conditions, it is critical for the vessel's crew to take appropriate measures to ensure safety. This can include altering course, speed adjustments, or any maneuvering necessary to prevent an incident.

Other scenarios, such as being in a designated shipping lane, during daylight hours, or following harbor control instructions, do not inherently trigger the necessity for a vessel to utilize all means for collision avoidance. Shipping lanes may dictate specific navigation rules but do not negate the responsibility to avoid collisions when there is a risk. Daylight conditions may improve visibility but do not impact the requirement to act in the face of potential danger. Similarly, instructions from harbor control pertain to navigation management rather than an inherent need for collision avoidance measures.

Thus, the clear directive stemming from the COLREGs supports the