Ganti rugi cemaran laut oleh tumpahan minyak (oil-spill) menurut konvensi international : studi kasus kecelakaan kapal nagasaki spirit di Selat Malaka ditinjau terhadap dampak pencemaran lingkungan laut = The Compensation of sea pollution caused by oil spill according to international convention : a case study on the accident of the ship Nagasaki Spirit at Mallaca strait viewed by the impact of sea pollution environment