Waterways define the geography and lifestyle of Car Nicobar, which is an oceanic island.
* **The Andaman Sea and Bay of Bengal:** The island is surrounded by these two massive bodies of water, which provide sustenance through fishing and act as the primary medium for transport (via ship) to Port Blair and other Nicobar islands. * **Ten Degree Channel:** Located to the north of Car Nicobar, this deep channel separates the Andaman Islands from the Nicobar Islands. * **Inland Water:** The island is generally flat and lacks major rivers; fresh water is primarily sourced from rainfall and groundwater wells.

