17. What is the function of clearing bearings?
(A) Checking a ship is remaining within a safe area or not.
(B) Checking a ship is on her course line or not.
(C) Checking ship’s speed is on expectation or not.
(D) Avoiding risk of collision.

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統計： A(48), B(31), C(16), D(42), E(0) #2335113