Tallest structure in India - 2 military radio masts

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I believe, that 2 military radio masts are the tallest structure in India, although I have no height values of them, but by easy shadow comparasion I got the result: the central mast of INS Kattabomman is 301 metres tall, but the shadows of these masts, which are situated just outside the facility are 1.54 times longer and so these masts may be approximately 460 metres tall!

Has someone more informations of these masts?