Ins tarkash f50 is the second teg class frigate constructed for the indian navyshe is part of the second batch of teg class frigates ordered by the indian navyshe was built at the yantar shipyard in kaliningrad russiashe was commissioned to navy service on 9 november 2012 at kaliningrad and joined the western naval command on 27 december 2012. Ins khukri was a british type 14 blackwood class frigate of the indian navyshe was sunk off the coast of diu gujarat india by the pakistan navy daphne class submarine hangor on 9 december 1971 during the indo pakistani war of 1971this was the first warship sunk in action by a submarine since the korean warit remains the post independence indian navys only warship to be lost in war to.