AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.<br>A:Blind sectors<br>B:Sheltered area<br>C:Unseen area<br>D:Unscanable area

AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
A:Blind sectors
B:Sheltered area
C:Unseen area
D:Unscanable area

出自：海船船员证

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