December 3, 1971, may be the day India officially went to war with Pakistan, after its air force, in the words of Mrs Indira Gandhi, struck at our airfields in Amritsar, Pathankot, Srinagar, Avantipur, Utterlai, Jodhpur, Ambala and Agra, but known to only a few, a Pakistani submarine, PNS Ghazi, had been on the prowl on India's eastern coast since November-end.