18.某船舶於「波羅的海」沿岸航行，誤闖某國軍事管制區。該輪嘗試退出該區，但是收到岸上發出的摩爾斯“X”燈號，問其意義為何？ (A)You are dragging. (B)Stop carrying out your intentions and watch for my signals. (C)You should stop your vessel instantly. (D)I have a pilot on board.