Pollution regulations require that each scupper in an enclosed deck area have a().
A、wooden plug
B、soft rubber plug
C、two-piece soft patch
D、mechanical means of closing
A、wooden plug
B、soft rubber plug
C、two-piece soft patch
D、mechanical means of closing
A、pollution by oil B、pollution by noxious liquid substances carried in bulk C、pollution by sewage from ships D、pollution by garbage from ships
A、two years B、one year C、until the next Coast Guard inspection D、until the end of the voyage