154、辅助操舵装置应能满足在最大营运前进航速的一半但不小于7Kn时进行操舵,使舵自一舷转至另一舷(),所需时间不超过()。

55. *The appliance shall be so constructed that the end from which the rocket is () can be positively identified by day or night.

54. *Every line-throwing appliance shall be capable of throwing a line of no less than 4 mm in diameter for a distance of () in calm weather.

53. *Each () needs to be regularly checked and maintained properly in order to be ready for use all the time.

52. () is a protective suit which reduces the body heat loss of a person wearing it in cold water.

51. *Every lifebuoy shall be of a () colour.

50. *The lifebuoy intended to operate the quick release arrangement provided for the self-activated smoke signals and self-igniting lights, have a mass of not less than () kg.

49. Every lifebuoy shall be fitted with grab lines and well secured at () providing four loops of line.

48. *The device on above picture is ().

47. *An immersion suit must be equipped with a( ) ().

46. According to IMO regulations, () shall be posted outside lifeboat?