Question 888Navigation General70% to pass
Your ARPA has been tracking a target and has generated the targets 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?
AI Explanation
The correct answer is D) The ARPA will generate data as if the target was still being tracked by radar.
This is because ARPA systems are designed to continue generating data on a target even if the radar loses the target echo due to weather conditions. The ARPA maintains a "memory" of the target's last known course and speed, and uses this information to extrapolate the target's position and movement during the time when the radar is unable to detect it. This allows the ARPA to provide continuous target information to the user, rather than losing the target completely.
The other answer choices are incorrect because A) the ARPA does not use sea return echoes to generate data, B) the ARPA does not lose all memory of the target, and C) the ARPA is not required to provide a lost target alarm in this situation.
Related Questions
#886 What will cause the ARPA to emit a visual alarm, audible alarm, or both? #887 You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges of .5 mile, 1 mile, and 1.5 miles. In this case, the unwanted echoes are called _______________.#889 Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the _______________.#890 The barometer is an instrument for measuring the _______________.#891 Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?