Manually operated band brakes may be f

1、（） may be fitted for operating the der

（） may be fitted for operating the derrick topping lift (the wire which adjusts the derrick height).AA capstanBA holdCA warp endDA mooring drum

2、Progressive flooding may be indicated

Progressive flooding may be indicated by（）.Aballast control alarmsBexcessive draftCexcessive list or trimDa continual worsening of list or trim

3、Distress signals may be（）.

Distress signals may be（）.Ared flaresBsmoke signalsCsound signalsDAny of the above

4、Engine operating conditions may be ind

Engine operating conditions may be indicated by the color of the exhaust smoke.Black smoke could indicate（）Aan insufficient speed droop settingBan overloaded engineCclogged drain holes in the oil control ringsDcomplete combustio

5、A person may operate an air compressor

A person may operate an air compressor in which of the following areas on board a tank barge?（）APumproomBGenerator roomCA space adjacent to a cargo tankDA space two meters from a cargo valve

6、Defense plans may cause the operation

Defense plans may cause the operation of electronic aids to navigation to be suspended with （）.Ano noticeBone day's noticeCa week's noticeDthirty (30) days notice