Pakistan Navy has released a special video to commemorate the golden jubilee of historic Hangor Day on Thursday.
The video shows the great success of Pakistan Navy submarine Hangor during 1971 war against the enemy.
According to the spokesperson of Pakistan Navy, Hangor Day is a reminder of the unmatched courage and unwavering commitment of Pakistan Navy's submarine Hangor.
In the 1971 war, Pakistan Navy submarine Hangor sank Indian Navy frigate Khukri and crippled Indian Navy Ship Kirpan.
The spokesperson said after the Second World War, it was the first incident in which a submarine destroyed a naval ship.
He said the enemy will never forget this great success of Pakistan Navy.