14. 在夜間時，救生站或海上搜救單位對遇險船舶或人員，發出將儘速前往援助之信號，每隔 1分鐘1次，發射多少個白色星鏃火箭？ (A)2 (B)3 (C) 4 (D) 5

17. Your vessel was vibrated heavily at a range of numbers of revolutions of the engines because synchronization occurs between the periods of a vibration of the hull and those caused by the inertia of the reciprocating parts of engines. What do we call this speed? (A)Regulative speed. (B)Critical speed. (C)Calibrating speed. (D)Difficult speed.