求翻译：接到信息后，东海救助局救助指挥值班室立即指令“东海救159”轮前往救助，夜航近7个小时，于16日7时30分抵达事发现场。16日20时40分，“东海救159”轮为难船实施拖救起航。是什么意思？

After receiving the information, the East China Sea Rescue Bureau Command Duty Office immediately rescue command "East Sea rescue 159" round to the rescue, night nearly seven hours, on at 7:30 on the 16th arrived at the scene. At 20:40 on the 16th, "the East China Sea rescue 159" wheel difficult to

After receiving information that the East China Sea Rescue Bureau rescue command Duty Office directive immediately rescued 159 "East Sea" to the rescue, going out at night round nearly 7 hours on June 16, 0730 arrived in the scene. 20 16:40 pm, the East Sea rescue vessels to take difficult round 159

After receives the information, the East China Sea Rescue Bureau rescue directs the duty officers observation room the instruction “East China Sea to rescue 159” the wheel to go to the rescue immediately, the night flight near 7 hours, 7 o'clock 30 minute arrival matters sends the scene on 16th.On 1

After receiving the information, Donghai rescue Bureau Ministry rescue commanding round-the-clock direct instruction "East China Sea rescued 159" wheels to aid night service for nearly 7 hours, 16th arrived in the affected areas. 16th, "the East China Sea rescued 159" turn embarrassed ships set sail

After receiving the information, the East China Sea Rescue Bureau Command Duty Office immediately rescue command "East Sea rescue 159" round to the rescue, night nearly seven hours, on at 7:30 on the 16th arrived at the scene. At 20:40 on the 16th, "the East China Sea rescue 159" wheel difficult to