Deck : General Navigation - 275/2138
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| You sight a buoy fitted with a double-sphere topmark. If sighted at night, this buoy would show a __________. |
| A) quick-flashing green light |
| B) flashing white light showing a group of two flashes |
| C) quick-flashing red light |
| D) flashing red light showing a group of three flashes |
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