Explanation:

• India’s 1st indigenous aircraft carrier "Vikrant" is currently under phase three of construction and likely to be commissioned by 2021.
• The phase three of construction which involves setting to work of machinery and other equipment like power generation, propulsion and machinery.It will go till acceptance of harbour, sea trials and aviation trial will also take a year and it will be fully operated by 2022.
• This carrier is being built at the Cochin Shipyard Limited Kochi, Kerala.