Although located in the heart of the Old World, Turkmenistan does have an international coastline. Consequently is also has a Contiguous Zone flag. This flags denotes that this area of the Earth is under economic and coastal authority of Turkmenistan.
This flag conserves the design of the Turkmeni flag but with Contiguous colours.
Likewise as the Caspian Sea is the twin to the Black Sea, the Caspian's Sea of Azov totally belongs to Turkmenistan. Yet to have an official English language, it is called Garabogazkol, which can be though of the as the the Mighty Black Sea.