45. 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. Which term is given to these unwanted echoes?

The radar returns at increasing ranges (0.5, 1.0, 1.5 miles) on the same bearing (090) indicate multiple echoes, which occur when a radar pulse reflects between the ship and a strong target, producing multiple returns at multiples of the true range.