The commission also directed the Navy to disclose reasons why the country chose a refurbished warship instead of purchasing a new one.
The deal for purchasing the ship, rechristened as INS Vikramaditya, was signed in 2004 by the then NDA government at USD 974 million which was increased to final price of USD 2.35 billion in 2010.
The commission has also directed the Indian Navy to disclose "net final cost" including the expenditure on the modifications, renovations and remodelling done on the now 30 -year-old ship and also dates of payments made by India.
Bhattacharyya directed the Navy to disclose file notings, correspondence, documents related to the acceptance of cost- revisions demanded by the Russians.
The commission has directed the disclosure as it found that there was a "larger public interest" in the information which was withheld by the ministry and the Navy on the grounds of national security.
Bhattacharyya also directed the ministry to disclose reasons why India chose to opt for a refurbished warship in place of a new one.
The ship was originally commissioned by the erstwhile USSR on December 20, 1987 and was decommissioned in 1996.
After being inducted in the Navy as Vikramaditya, the ship is now a floating airfield with a length of 284 metres.
It is a 20-storeyed steel megastructure floating in the sea from keel to the highest point.
The ship can carry over 30 aircraft including state-of- the-art MiG 29K or Sea Harriers, Kamov 31, Kamov 28, Sea King, ALH-Dhruv and Chetak helicopters.
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