GIGLIO, Italy -- The official overseeing the search effort of the capsized Costa Concordia has acknowledged it would take a miracle to find any survivors from the Jan. 13 cruise ship grounding.

Franco Gabrielli, head of the national civil protection agency, told reporters Wednesday that recovery operations would nevertheless continue until the ship, which is half-submerged off the Tuscan island of Giglio, was searched as much as possible.

Operations continued Wednesday as crews set off more explosions on the submerged third floor deck to allow easier access for divers. On Tuesday, the body of a woman was found on the deck.

Rescuers have found 16 bodies, with 17 people still unaccounted for.