Deck : General Navigation - 1033/2138
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| 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) When plotted, their movements are usually abnormal. |
| D) The indirect echoes usually appear in shadow sectors. |
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