What does a CPA that is less than the configured alert level mean?

Prepare for the Radar Observer Unlimited Exam with flashcards and multiple-choice questions that include hints and explanations. Equip yourself for examination success!

Multiple Choice

What does a CPA that is less than the configured alert level mean?

When the predicted Closest Point of Approach (CPA) is smaller than the configured alert level, it signals a potential collision risk that requires action. CPA is the distance at which two vessels would be closest to each other if both continue on their present courses and speeds. The alert level is a threshold set in the system to indicate when that predicted proximity is close enough to warrant caution. So, a CPA below that threshold means you should start collision-avoidance actions, such as changing course or reducing speed, in line with safe navigational practices and the COLREGs. It doesn’t tell you which side the other vessel is on, it doesn’t mean there is no risk, and it isn’t automatically zero.

When the predicted Closest Point of Approach (CPA) is smaller than the configured alert level, it signals a potential collision risk that requires action. CPA is the distance at which two vessels would be closest to each other if both continue on their present courses and speeds. The alert level is a threshold set in the system to indicate when that predicted proximity is close enough to warrant caution. So, a CPA below that threshold means you should start collision-avoidance actions, such as changing course or reducing speed, in line with safe navigational practices and the COLREGs. It doesn’t tell you which side the other vessel is on, it doesn’t mean there is no risk, and it isn’t automatically zero.

More practice questions