Just quietly, I'm not so sure carriers are the way to go about (to paraphrase) "dominating the Indian Ocean".The IN stated doctrine is to be a Blue Water Navy and for this purpose it's philosophy has been that of long range missions - it has in the last 5 yrs made so many port calls (am not even including the sailing ship which visited about 80 countries - i think - in its circumnavigation trip) and displayed its flag - these goodwill missions are also to display the INs prowess. During the the Tsunami the Indian Navy was the first navy to reach Indonesia with relief supplies (5450 kms) The IN is now near Somalian waters (approx 3200 kms) India has a listening post in madagascar (about 5500 KMs). India needs a navy which can dominate the Indian Ocean as the primary naval power. It will also need access to the gulf of aden and the gulf of oman as well as the persian gulf as this area is of vital economic and security concerns to India (tens of millions of Indians work and send home much valued forex - foriegn remittances are actualy India's largest source of forex - even bigger than IT and ITES industry, also India has large investments in oil exploration and releated areas)
The Indian Ocean is a big place, with very few land masses and/or population centers within it. This creates very few SLOCs, 1 with heavy traffic density, 1 medium density and 4 lightly traveled.
Therefore the Indian Ocean can be "dominated" by a reasonably decent recon and survelliance operation with assets (submarines are a good example) to act upon the information.
If you were to use carriers to do same (as above) then 2 groups would be required to provide influence over the densely travelled SLOC (East and West) and they would have little to no impact upon the other SLOCs (although Indian Ballistic Missile tests have an irritating habit of disrupting some of the others with falling debris).
Seems like the IN already have a reasonable idea of what they want to do and how to do it.