The
Ghazi was 600 kilometers off Bombay on 16 November, off Ceylon on 19 November, and entered the Bay of Bengal on 20 November 1971. She started looking for the
Vikrant on 23 November off Madras but was not aware that she was 10 days too late and the
Vikrant was actually somewhere near the Andaman islands. The Indian Vice Admiral Krishnan sent for Captain Inder Singh, the commanding officer of the
Rajput for detailed briefing at about 16:00 on 1 December and told him that a Pakistani submarine had been sighted off Ceylon and was absolutely certain that the submarine would be somewhere around Madras/Vishakapatnam. He made it clear that once
Rajput had completed refueling, she must leave the harbor with all navigational aids switched off.
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According to Indian claims, at 23:40 on 3 December, taking on board a pilot,
Rajput moved through the channel to the exit from Vishakhapatnam.
[20][21]
Exactly at midnight, shortly after passing the entrance buoy, starboard lookout reported breaker on the surface of the water right on the nose. Singh, changing the course at full speed across the specified point and ordered to loose two depth charges, which was done. The explosions were "stunning", and the ship suffered a serious concussion. However, visible results of this attack are not given. Rajput for some time surveyed the area dumping bombs, no longer found any contact — either visual or acoustic. A few minutes later the destroyer continued on her way to the coast of East Pakistan.
[20][21]
https://en.wikipedia.org/wiki/PNS_Ghazi
Moreover , under Dark and with no Lights , Egyptian Navy person saw the Ships after an hour of explosion, When eve ship is under operations already in War, it take one hour to get the engine start of the ship ? this is not possible.