This introductory note examines the development at the International Tribunal for the Law of the Sea for the year 2020. While there was no judgment in 2020, proceedings of two cases, the M/T “San Padre Pio” (No. 2) Case (Switzerland/Nigeria) and the Dispute Concerning Delimitation of the Maritime Boundary between Mauritius and Maldives in the Indian Ocean (Mauritius/Maldives), continue. Accordingly, this note discusses the issues of the two pending cases. Furthermore, there were some important events regarding the Tribunal in 2020. Among other things, this note focuses on an adoption of a Model Agreement between ITLOS and Singapore, the election of the seven members of the Tribunal, and amendments of the Rules of the Tribunal.