What will cause the Electronic Plotting Aid (EPA) to emit a visual alarm, audible alarm, or both?

Correct Answer: Option C — A tracked target entering your preset CPA-TCPA limits

EPA systems are designed to provide early warning of collision risks. Per IMO performance standards for radar plotting aids, the system must trigger an alarm when a tracked target's predicted Closest Point of Approach (CPA) and Time to Closest Point of Approach (TCPA) violate the operator's pre-set safety limits.