The International Association of Lighthouse authorities (IALA) buoyage system “A” uses some types of marks to distinguish safe navigation? Which type(s) does(do) not belong to the system?（）<br>A:lateral marks and cardinal marks<br>B:safe water marks<br>C:isolated danger marks and special marks<br>D:dangerous water marks

The International Association of Lighthouse authorities (IALA) buoyage system “A” uses some types of marks to distinguish safe navigation? Which type(s) does(do) not belong to the system?（）
A:lateral marks and cardinal marks
B:safe water marks
C:isolated danger marks and special marks
D:dangerous water marks

出自：海船船员证

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