"For whom is the ISM code mandatory?
A.All vessels 500GRT and above
B.all tankers
C.all vessels built after 1998
D.All vessels on international routes"
正确答案是A
"For whom is the ISM code mandatory?
A.All vessels 500GRT and above
B.all tankers
C.all vessels built after 1998
D.All vessels on international routes"
正确答案是A