8. Which of the following navigation instruments may have blind sectors?
(A) Gyro Compass
(B) Radar
(C) NAVTEX
(D) ECDIS
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統計: A(5), B(91), C(17), D(9), E(0) #3751973
統計: A(5), B(91), C(17), D(9), E(0) #3751973