Jurisdiction — Territorial — Over ports and national waters — Foreign vessels operating under flags of convenience — Trade union boycott — Vessels immobilized in port — Competence of municipal courts to order port authorities to safeguard freedom of navigation and access to sea — Port of Antwerp

Nationality — Ships — Flag of convenience

Sea — Ports and national waters — Jurisdiction over foreign vessels — Vessels immobilized by trade union boycott — The law of Belgium