The April 18, 2015 wreck remains one of the deadliest on record, though the real number of drownings will never be known. Most of the migrant boats that sink are never recovered, and the dead are never exhumed or identified. On that night, the boat carrying between 700 and 800 migrants, most of them African, capsized as a civilian freighter approached. The navy submerged a giant yellow-framed rectangular apparatus to stabilize the wreck and affix support legs to its hull. Soon after the 2015 tragedy, though, Italy pledged to recover the wreck and is hoping that the exercise will help create a European network to identify victims by cross-checking data.

Source: ABC News June 29, 2016 08:19 UTC