I want to know the answer to the following question:
Who dominated any battles that may have taken place at sea?
All the background I'm provided with is that "The last sea battle of the Korean War occurred at Inchon, days before the Battle of Incheon; the ROK ship PC-703 sank a North Korean mine layer in the Battle of Haeju Island, near Inchon.". Is that enough to answer the question?