Your ARPA has been tracking a target and has generated the target's course and speed. The radar did not receive a target echo on its last two scans due to the weather. What should you expect under these circumstances?

In this scenario, the Automatic Radar Plotting Aid (ARPA) uses the previously collected data on the target's course and speed to continue generating information, even though the radar has lost its echo due to adverse weather conditions. This function ensures that the tracking system can maintain situational awareness and provide continuous information based on the last known parameters of the target.

When a target echo is not received on the last two scans, the ARPA does not suddenly lose all previous tracking data. Instead, it intelligently utilizes the last known course and speed to approximate the target's path, which allows for the prediction of its position until the radar can reacquire the signal. This feature is crucial because it helps the navigator to continue assessing potential collisions or navigational challenges even when the radar feed is compromised.

Therefore, the correct answer highlights the ARPA's capability to maintain tracking estimates based on historical information, allowing it to generate predictive data until more signals can be obtained.