(Agencies)
Updated: 2007-12-04 10:53

The apparently small size of the puncture suggests the ship may have struck something harder than ice, according to Claude Daley, an expert in ice-reinforced ship design at Memorial University in St. John's, Newfoundland. "A fist-sized hole doesn't sound like ice damage to me," he says. "You need something very hard to cause a small hole in steel. Stone, for instance."

One possibility, says Skog, is a large stone embedded in floating glacial ice. "There can be huge rocks frozen into the ice, and they can be hard to see," he says. "When I was down there in the '70s, in poorly charted waters, you would see things that looked like little islands, but were actually floating."

Whatever caused the damage, Mr. Calisal says it shouldn't have sunk the ship by itself. "Passenger ships are designed with many watertight compartments to contain flooding," he says. "There had to have been a chain of failures to prompt the captain to abandon ship."

Explorer's owner, GAP Adventures of Toronto, is unable to provide further information on the incident, now that their insurance company, Steamship Mutual, is investigating, according Susan Hayes, the GAP Adventure's vice president for marketing. "We don't know exactly what happened," she said. "At this point, I'm not actively in the loop."

Reviewing the facts Initial reports from the company – and accounts given by passengers and crew – suggest something unexpected happened aboard the ship while the crew worked to contain the damage.

The incident started about midnight local time (GMT-3), when the Explorer struck something, suffering damage amidships on the starboard side of the lowest passenger level. Passengers there recalled hearing two loud bangs and the sound of rushing water, as their cabins began to flood. They alerted the crew, and a distress call was sent out at 12:20 am.

While passengers congregated in the muster station on an upper deck, the crew located what Ms. Hayes said was "a crack and a fist-sized hole." The Toronto Globe & Mail reported November 24 that the crew sealed the affected compartment with watertight doors and, for about an hour, appeared to have stabilized the situation with bilge pumps.

Several witnesses have since recounted that while they were waiting in the muster station, the Explorer drifted into a large iceberg. The iceberg – which one passenger described as being as big as the ship – reportedly struck the damaged starboard side.

Water levels reportedly began rising again sometime after 1:30 am, although it is not clear if this was a result of the second collision. Power failed, and, at about 3 am, Captain Bengt Wiman gave the order to abandon ship. Two other cruise ships arrived on the scene at about 7 a.m. to begin plucking passengers and crew from lifeboats and rafts. All 154 aboard were rescued. Explorer, which had rolled on her starboard side, reportedly sank that evening.

"The worst thing is that the ship probably sank with the secret of what really happened," says Skog, who hopes investigators manage to find the answer. "On our ships we need to know the facts; speculations aren't really fruitful for us."

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