海難救助與撈救統一規定公約 國際海難救助公約 聯合國海洋法公約 契約海難救助 自願海難救助 當事人意思自主原則 無效果無報酬原則 無效果仍報酬原則 場所支配行為原則 International convention for the unification of certain rules of respecting assistance and salvage at sea International convention on salvage United nations convention on the law of the sea Contractual salvage Volunteer salvage The autonomy of the parties No cure no pay No cure still pay Locus regit actum