"We almost managed to avoid the rock. Imagine what could have been done with only 30 more seconds, if I had been given all the data," he said, according to Italian daily Il Tirreno.
Thirty-two people lost their lives when the cruise ship sank off Italy's coast in January 2012, which subsequently resulted in charges of manslaughter, abandoning ship against Schettino. If convicted he faces up to 20 years behind bars.
"I am willing to take one part of the responsibility, but only one part," he said.
The Concordia, twice the size of the Titanic, was moving at a brisk 16 knots and had 4,229 people from 70 countries on board when it struck the rocks.
It hull pierced below the waterline on impact, the giant vessel slowly lumbered one way, then the other before finally sinking and settling, half-submerged on the sea-bed.