With reference to the Matsya-6000, consider the following statements:
1. It is an unmanned submersible vehicle developed under the Samudrayaan mission to facilitate humans in the deep ocean in exploring mineral resources.
2. It was developed by the National Institute of Ocean Technology (NIOT), Chennai.
3. It relies only on gravity, water, and lithium-ion batteries for power.
How many of the above statements are correct?