U said what Japan and S.Korean did in Vietnam War is the truth. But ur plan won't help anything for ur country, just ruin it worse. I think we need serious chats, it's very bad idea.
1. Above post i said now most ocean cargo ships flying 3rd country's flag,not China or Japan or Korea, they belong to
Panama or other South America countries.
2. Not like fishship, now one ocean cargo ship carrying container goods from many countries including China's, Korea's and Japan's. The ship will dock in different countries to unload their containers. U sink one cargo ship, it also means damage to other Asian nation's ocean trade.
So whatever u send sea mines or ur Su-30mkk attack any ocean cargo ship sailing on the SCS, ur country fight with many Asian countries. This is a Economic Globalization world !
The only solution is ur Navy send many warships on the SCS, to check every ocean cargo ship one by one, to inspect whether this ship carrying enemy's containers, just like U.S Navy did arms embargo. Pity, we all knew u can't.