6. 飛機希望通知遇險者給予指示，投放一個信號匣艙，該匣艙應繫上何物？(A) 食物(B) 淡水(C) 白色長條彩帶(D) 高顯示度之長條彩帶

7. A vessel is seen showing three lights in a vertical line; the top and bottom ones are red andthe middle one is white. What does this night time signals indicate?(A) It is a dredging ship not engaged in operation.(B) It is a vessel at anchor.(C) It is a vessel restricted her ability to manoeuvre.(D) It is a vessel engaged in a mine clearance operation.