The train monitoring and recording devices are operating railway facilities in the analysis of our situation and the transport on the basis of actual demand, and to ensure a safe operation of trains for the primary purpose of the train operating speed control devices. 列车运行监控记录装置是在分析我国铁路设施状况和运输实际需求的基础上,研制的一种以保障列车运行安全为主要目的的列车运行速度控制装置。
This essay expounds the measurements of safe maneuver of ships, the key points of attention through navigation lookout, radar operating, speed control and alteration of course for avoiding collision in restricted visibility so as to ensure the safety of the voyage. 本文从船舶驾驶了望、雷达操纵、航速控制和改向避让行动等四方面来论述船舶在能见度不良时的安全操纵措施和注意事项,以确保航行安全。