This document provides an overview of the United Nations Convention on the Law of the Sea (UNCLOS-III). It discusses key concepts in UNCLOS-III including maritime zones like the territorial sea, exclusive economic zone, and continental shelf. It also covers maritime boundaries and methods for delineating boundaries. Specifically, it highlights how UNCLOS-III is relevant for Bangladesh, including reviewing Bangladesh's baselines and maritime zones, resolving maritime boundary issues according to UNCLOS-III, and ensuring peaceful use of the Bay of Bengal. The document aims to familiarize the reader with UNCLOS-III and visualize how it applies to Bangladesh's maritime zones.