121. Internal waters.

Internal waters or national waters are those areas of water, including parts of the sea, which are under the full sovereignty of the territorial state. They consist of all the waters that lie landward of the baselines from which the territorial sea1 is measured2, and include inland waters, ports, and certain estuaries and bays3. Internal waters differ from the territorial sea in that there exists through the territorial sea, but not in internal waters, a right of innocent passage for foreign ships4. Foreign warships require specific permission to enter internal waters5. While maritime ports are in practice ordinarily open