An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?
A
Their bearing is almost constant, even when the true bearing of the contact changes appreciably.
B
They always appear on a bearing of 90°From the true bearing of the contact.
C
The indirect echoes usually appear in shadow sectors.
D
When plotted, their movements are usually abnormal.
E
İlgili Sorular
A mid-channel buoy, if lighted, will show a __________.You are the person in charge of a vessel involved in a marine casualty. You must notify the nearest...The equation of time measures the __________.Which publication should you check for complete information on Puget Sound weather conditions?What shall be conducted during a fire and boat drill?