"New tankers (the better ones, anyhow) are double-hulled. Should cruise liners be built with this safety specification? "

Certainly! It's clear that whatever watertight bulkhead system the Costa Concordia had proved inadequate. She was reported in the media as speeding along at 15 knots when her side struck the reef as the ship was turning back out to the main channel. The Captain has acknowledged that he was "late" in making his turn.

Charley Noble