A stand-on vessel does not have to take action until she 'finds herself so close that collision cannot be avoided by the action of the give-way vessel alone.' This point is known as 'in extremis'.

A stand-on vessel does not have to take action until she 'finds herself so close that collision cannot be avoided by the action of the give-way vessel alone.' This point is known as 'in extremis'.

• A. True
• B. False
• C. Not defined
• D. Unknown

Answer: (A)

The situation being tested is the moment when a stand-on vessel can no longer rely on the give-way vessel to avoid collision and must take action herself. In collisions avoidance practice, the stand-on vessel normally keeps her course and speed, but there is a threshold—a point at which collision cannot be avoided by the give-way vessel’s maneuver alone. That moment, often described as “in extremis,” is when the stand-on vessel may and should take action to avoid a collision, even if that means altering course or speed. This concept helps explain why, even though one vessel has the stand-on obligation, there is a recognized point at which proactive action becomes necessary to prevent disaster. If the give-way vessel’s actions are insufficient or begun too late, the stand-on vessel is permitted to and must act to avert the danger. The other options aren’t appropriate because this term describes a real, practical threshold used in collision avoidance practice, not something undefined or unknown.

The situation being tested is the moment when a stand-on vessel can no longer rely on the give-way vessel to avoid collision and must take action herself. In collisions avoidance practice, the stand-on vessel normally keeps her course and speed, but there is a threshold—a point at which collision cannot be avoided by the give-way vessel’s maneuver alone. That moment, often described as “in extremis,” is when the stand-on vessel may and should take action to avoid a collision, even if that means altering course or speed.

This concept helps explain why, even though one vessel has the stand-on obligation, there is a recognized point at which proactive action becomes necessary to prevent disaster. If the give-way vessel’s actions are insufficient or begun too late, the stand-on vessel is permitted to and must act to avert the danger.

The other options aren’t appropriate because this term describes a real, practical threshold used in collision avoidance practice, not something undefined or unknown.