Which of the following best describes Inland Waters?

The term "Inland Waters" refers specifically to those bodies of water that are located on the landward side of the baseline of the territorial sea. This includes rivers, lakes, and other such bodies of water that are not influenced by the tides of the ocean. They are typically under the jurisdiction of the state in which they are located and are considered internal to the nation's land territory.

The other options do not accurately describe Inland Waters. For example, waters beyond the baseline of the territorial sea refer to maritime zones, while the concept of open sea does not fit within the definition of inland waters, which are specifically internal to land. Additionally, the description of waters navigable only by small vessels is too restrictive; inland waters can indeed accommodate larger ships, depending on the specific waterway conditions and regulations. Therefore, the most accurate definition is that they are located on the landward side of the territorial sea's baseline.