大管轮 meaning in Chinese

second engineer officer
senior first engineer

My final rank on borad is second engineer
在此期间由实习生逐级做到大管轮的职务。
I and two truck call " two rail " - first engineman at once go to ship board , it floats seas " spend at oils " for the large stretch of one run and check arbitrarily the next on run at we , all is normal , fantastic , then " oil " that comes
我和二车国内叫“二轨”大管轮赶紧跑到船舷，海面飘著大片的“油花” ，我们跑上跑下一通乱查，一切正常，见鬼，那来的“油” ？
I and two truck ( call " two rail " - - first engineman ) at once go to ship board , it floats seas " spend at oils " for the large stretch of one run and check arbitrarily the next on run at we , all is normal , fantastic , then " oil " that comes
我和二车（国内叫“二轨” ? ?大管轮）赶紧跑到船舷，海面飘著大片的“油花” ，我们跑上跑下一通乱查，一切正常，见鬼，那来的“油” ？