38. 圖示信號旗，係表示： (A) F (B) P (C) W (D) Z

4. What sound signals should a vessel engaged in fishing, sound in reduced visibility? (A) One prolonged followed by two short blasts at intervals of not more than 2 minutes. (B) One prolonged blast at intervals of not more than 2 minutes. (C) Two prolonged blasts at intervals of not more than 2 minutes. (D) Four short blasts at intervals of not more than 2 minutes.