In The Shipmaster's Duty to Render Assistance at Sea under Internationl Law, Felicity G. Attard examines the web of applicable international rules regulating one of the most fundamental obligations at sea. The study explores the shipmaster's duty to render assistance at sea under treaty law, customary international law, and other international instruments. It focuses on an assessment of the duty in light of contemporary challenges posed by the phenomenon of irregular migration by sea, a problem which has intensified in recent years. Whilst Article 98 of the 1982 United Nations Convention on the Law of the Sea provides the basis for the regime regulating the duty, the study addresses other relevant rules adopted by the International Maritime Organization and the International Labour Organization. Due to the humanitarian ramifications of the rendering of assistance at sea, the book considers further obligations imposed under human rights law and refugee law. The study presents a comprehensive analysis of shipmaster's responsibilities in rescue operations, and their role in the fulfilment of States' international obligations in the rendering of assistance.