A video has emerged showing the crew of the Costa Concordia reassuring passengers nothing was wrong, after the cruise ship had begun taking in water.
In the amateur footage, a crew member says "everything is under control" and a generator problem will be fixed. She asks passengers to go to their cabins.
The vessel ran aground off Italy's coast with some 4,200 people on board and capsized. At least 11 people died.
It is thought the delay in deciding to abandon the ship may have cost lives.
Earlier on Thursday, Italian media broadcast what they say was the first phone conversation between port officials and crew of the Costa Concordia - about 30 minutes after the ship hit rocks.
In the exchange, a crew member is heard saying it is experiencing only a blackout.
Twenty-one people are still missing, and hopes to find any of them alive are fading fast.
'Seated and tranquil'
The latest amateur footage was posted online by Italy's Rainews24 on Thursday.
In it, a female crew member is heard telling passengers: "We kindly ask you to return to your cabins, or go for a walk in the hall, if you like."
She says that she is relaying a message from the commander.
"We'll resolve the electrical problem that we have with the generator. Everything will be fine. If you want to stand here, it's fine.
"But I'm kindly asking you to go back to your rooms, where you'll be seated and tranquil. Everything is under control."
In the audio tape aired earlier on Thursday, a port authority officer is heard asking the crewman about the situation on board, after passengers had reported a huge jolt and been told to put on life vests.
But an unidentified voice from the Costa Concordia replies: "We had a blackout and we are checking the conditions on board."
"Do you need help or are you staying in the Giglio area for now?" the port official asks.
"Confirmed. We remain here in the area to check the blackout," the crew member replies, without making any reference to a crash.
The BBC's Alan Johnston on Giglio says the impression left by the recording is that the crewman failed to give a full account of the gravity of the situation.
The ship's captain, Francisco Schettino, is under house arrest on suspicion of multiple manslaughter.
The owners say he was sailing too close to Giglio on an unauthorised course.
Prosecutors have also accused him of fleeing the ship before evacuation was complete. He denies the accusations.
However Italian media have said Capt Schettino did admit to making a navigational error.
He told investigators he had "ordered the turn too late" as the luxury ship sailed close to an island, according to a leaked interrogation transcript.
He also reportedly said the crew had decided to sail close to the island to salute a former colleague.
The company that owns the ship, Costa Cruises, has suspended Capt Schettino and withdrawn an offer to pay his legal costs, according to reports.
Italian media have also shown pictures of a Moldovan woman who says she was on the bridge after the ship ran aground. The woman defended Capt Schettino's actions, in an interview with Moldovan TV.
The reports say investigators are trying to speak to her.
Rescue workers are continuing their search of submerged parts on the ship, after the coastguard said the wreck had stabilised.
Salvage operators are standing by to start pumping fuel from the ship's tanks to avoid a potential environmental disaster.