- NEW: Official release the transcript between the plane and air traffic control
- China has ruled out 11 parts of the Indian Ocean where objects were spotted
- Tuesday's search for Flight 370 includes 11 planes, 9 ships
- Source: The plane's turn off course is being considered a "criminal act"
Kuala Lumpur, Malaysia (CNN) -- They were words heard around the world as investigators searched for the missing Malaysia Airlines plane.
Weeks ago, Malaysian authorities said the last message from the airplane cockpit was, "All right, good night."
The sign-off to air traffic controllers, which investigators said was spoken by the plane's copilot, was among the few concrete details officials released in a mystery that's baffled investigators since the Boeing 777 disappeared with 239 people aboard on March 8.
Looking to past for Flight 370 answers There's only one problem. It turns out, it wasn't true.
Australia: 'The search area is very large' 
MH370: Malaysian investigation failures 
Official: We're in the right place 
A woman prepares for an event in honor of those aboard Malaysia Airlines Flight 370 on Sunday, March 30, in Kuala Lumpur, Malaysia. Authorities are combing thousands of square miles of the southern Indian Ocean in search of the wreckage of Flight 370, which disappeared March 8. Malaysian authorities declared that the plane had most likely been lost with all aboard in the remote sea far off Australia. 
An underwater search-surveying vehicle sits on the wharf in Perth, Australia, ready to be fitted to a ship to aid in the search for the jet on March 30. 
A girl writes a note during a ceremony for the missing passengers in Kuala Lumpur on March 30. 
A teary-eyed woman listens from the back as other relatives of Chinese passengers on board Flight 370 speak to reporters March 30 in Subang Jaya, Malaysia. Dozens of anguished Chinese relatives demanded that Malaysia provide answers to the fate of those on board. 
An object floating in the southern Indian Ocean is seen from a Royal New Zealand Air Force P-3K2 Orion aircraft searching for the missing jet on Saturday, March 29. Ships participating in the search retrieved new debris Saturday but no objects linked to missing plane, according to Australian authorities. 
A Royal New Zealand Air Force member launches a GPS marker buoy over the southern Indian Ocean on March 29. 
The sole representative of families of passengers aboard missing Malaysia Airlines Flight 370 leaves a conference at a Beijing hotel on Friday, March 28, after other relatives left en masse to protest the Malaysian government's response to their questions. 
A member of the Royal Australian Air Force is silhouetted against the southern Indian Ocean during the search for the missing jet on Thursday, March 27. 
Flight Lt. Jayson Nichols looks at a map aboard a Royal Australian Air Force aircraft during a search on March 27. 
People in Kuala Lumpur, Malaysia, light candles during a ceremony held for the missing flight's passengers on March 27. 
Crew members of the Chinese icebreaking ship Xuelong scan the Indian Ocean during a search for the missing jet on Wednesday, March 26. 
People work at a console at the British satellite company Inmarsat on Tuesday, March 25, in London. 
The mother of a passenger who was on Malaysia Airlines Flight 370 cries at her home in Medan, Indonesia, on March 25. 
Australian Defense Minister David Johnston speaks to the media March 25 about the search for the missing jet. 
A family member of a missing passenger reacts after hearing the latest news March 25 in Kuala Lumpur. 
Angry relatives of those aboard Malaysia Airlines Flight 370 react in Beijing on Monday, March 24, after hearing that the plane went down over the southern Indian Ocean, according to analysis of satellite data. 
Grieving relatives of missing passengers leave a hotel in Beijing on March 24. 
Malaysian Prime Minister Najib Razak, center, delivers a statement about the flight March 24 in Kuala Lumpur, Malaysia. Razak's announcement came after the airline sent a text message to relatives saying it "deeply regrets that we have to assume beyond any reasonable doubt that MH 370 has been lost and that none of those onboard survived." 
Relatives of the missing passengers hold a candlelight vigil in Beijing on March 24. 
A member of the Royal Australian Air Force looks out an aircraft during a search for the missing jet March 24. 
A woman reads messages for missing passengers at a shopping mall in Kuala Lumpur on March 24. 
Flight Lt. Josh Williams of the Royal Australian Air Force operates the controls of an AP-3C Orion on Sunday, March 23, after searching the southern Indian Ocean. 
Ground crew members wave to a Japanese Maritime Defense Force patrol plane as it leaves the Royal Malaysian Air Force base in Subang, Malaysia, on Sunday, March 23. The plane was heading to Australia to join a search-and-rescue operation. 
A passenger views a weather map in the departures terminal of Kuala Lumpur International Airport on Saturday, March 22. 
A Chinese satellite captured this image, released on March 22, of a floating object in the Indian Ocean, according to China's State Administration of Science. It is a possible lead in the search for the missing plane. Surveillance planes are looking for two objects spotted by satellite imagery in remote, treacherous waters more than 1,400 miles from the west coast of Australia. 
A member of the Royal Australian Air Force looks down at the Norwegian merchant ship Hoegh St. Petersburg, which took part in search operations Friday, March 21. 
The Royal Australian Air Force's Neville Dawson, left, goes over the search area with Brittany Sharpe aboard an AP-3C Orion some 2,500 kilometers (about 1,500 miles) southwest of Perth, Australia, over the Indian Ocean on March 21. 
Satellite imagery provided by the Australian Maritime Safety Authority on Thursday, March 20, shows debris in the southern Indian Ocean that could be from Flight 370. The announcement by Australian officials that they had spotted something raised hopes of a breakthrough in the frustrating search. 
A closer look at the satellite shot of possible debris from Malaysia Airlines Flight 370. 
Another satellite shot provided by the Australian Maritime Safety Authority shows possible debris from the flight. 
A closer look at the satellite shot of possible debris. 
The Australian Maritime Safety Authority's John Young speaks to the media in Canberra, Australia, on March 20 about satellite imagery. 
A distraught relative of a missing passenger breaks down while talking to reporters at Kuala Lumpur International Airport on Wednesday, March 19. 
A relative of missing passengers waits for a news briefing by officials in Beijing on Tuesday, March 18. 
A relative of a missing passenger tells reporters in Beijing about a hunger strike to protest authorities' handling of information about the missing jet. 
A member of Indonesia's National Search and Rescue Agency joins in a search for the missing plane in the Andaman Sea area around the northern tip of Indonesia's Sumatra on Monday, March 17. 
Relatives of missing passengers watch a news program about the missing plane as they await information at a hotel ballroom in Beijing on March 17. 
Malaysian Transportation Minister Hishamuddin Hussein, center, shows maps of the search area at a hotel next to the Kuala Lumpur International Airport on March 17. 
U.S. Navy crew members assist in search-and-rescue operations Sunday, March 16, in the Indian Ocean. 
Indonesian personnel watch over high seas during a search operation in the Andaman Sea on Saturday, March 15. 
A foam plane, which has personalized messages for the missing flight's passengers, is seen at a viewing gallery March 15 at Kuala Lumpur International Airport. 
A member of the Malaysian navy makes a call as his ship approaches a Chinese coast guard ship in the South China Sea on March 15. 
A Indonesian ship heads to the Andaman Sea during a search operation near the tip of Sumatra, Indonesia, on March 15. 
Elementary school students pray for the missing passengers during class in Medan, Indonesia, on March 15. 
Col. Vu Duc Long of the Vietnam air force fields reporters' questions at an air base in Ho Chi Minh City, Vietnam, after a search operation on Friday, March 14. 
Members of the Chinese navy continue search operations on Thursday, March 13. The search area for Flight 370 has grown wider. After starting in the sea between Malaysia and Vietnam, the plane's last confirmed location, efforts are expanding west into the Indian Ocean. 
A Vietnamese military official looks out an aircraft window during search operations March 13. 
Malaysian air force members look for debris on March 13 near Kuala Lumpur. 
A relative of a missing passenger watches TV at a Beijing hotel as she waits for the latest news March 13. 
A member of the Indonesian National Search and Rescue Agency scans the horizon in the Strait of Malacca on Wednesday, March 12. 
Relatives of missing passengers wait for the latest news at a hotel in Beijing on March 12. 
Journalists raise their hands to ask questions during a news conference in Sepang on March 12. 
Indonesian air force officers in Medan, Indonesia, examine a map of the Strait of Malacca on March 12. 
A member of the Vietnamese air force checks a map while searching for the missing plane on Tuesday, March 11. 
Iranians Pouri Nourmohammadi, second left, and Delavar Seyed Mohammad Reza, far right, were identified by Interpol as the two men who used stolen passports to board the flight. But there's no evidence to suggest either was connected to any terrorist organizations, according to Malaysian investigators. Malaysian police believe Nourmohammadi was trying to emigrate to Germany using the stolen Austrian passport. 
An Indonesian navy crew member scans an area of the South China Sea bordering Indonesia, Malaysia and Thailand on Monday, March 10. 
Vietnam air force Col. Le Huu Hanh is reflected on the navigation control panel of a plane that is part of the search operation over the South China Sea on March 10. 
Relatives of the missing flight's passengers wait in a Beijing hotel room on March 10. 
A U.S. Navy Seahawk helicopter lands aboard the USS Pinckney to change crews before returning to search for the missing plane Sunday, March 9, in the Gulf of Thailand. 
Members of the Fo Guang Shan rescue team offer a special prayer March 9 at Kuala Lumpur International Airport. 
A handout picture provided by the Malaysian Maritime Enforcement Agency shows personnel checking a radar screen during search-and-rescue operations March 9. 
Italian tourist Luigi Maraldi, who reported his passport stolen in August, shows his current passport during a news conference at a police station in Phuket island, Thailand, on March 9. Two passengers on the missing Malaysia Airlines flight were reportedly traveling on stolen passports belonging to Maraldi and an Austrian citizen whose papers were stolen two years ago. 
Hugh Dunleavy, commercial director of Malaysia Airlines, speaks to journalists March 9 at a Beijing hotel where relatives and friends of the missing flight's passengers are staying. 
Vietnamese air force crew stand in front of a plane at Tan Son Nhat airport in Ho Chi Minh City on March 9 before heading out to the area between Vietnam and Malaysia where the airliner vanished. 
Buddhist monks at Kuala Lumpur International Airport offer a special prayer for the missing passengers on March 9. 
The Chinese navy warship Jinggangshan prepares to leave Zhanjiang Port early on March 9 to assist in search-and-rescue operations for the missing Malaysia Airlines flight. The Jinggangshan, an amphibious landing ship, is loaded with lifesaving equipment, underwater detection devices and supplies of oil, water and food. 
Members of a Chinese emergency response team board a rescue vessel at the port of Sanya in China's Hainan province on March 9. The vessel is carrying 12 divers and will rendezvous with another rescue vessel on its way to the area where contact was lost with Malaysia Airlines Flight 370. 
The rescue vessel sets out from Sanya in the South China Sea. 
A family member of missing passengers is mobbed by journalists at Kuala Lumpur International Airport on Saturday, March 8. 
A Vietnamese air force plane found traces of oil that authorities had suspected to be from the missing Malaysia Airlines plane, the Vietnamese government online newspaper reported March 8. However, a sample from the slick showed it was bunker oil, typically used to power large cargo ships, Malaysia's state news agency, Bernama, reported on March 10. 
Malaysian Prime Minister Najib Razak, center, arrives to meet family members of missing passengers at the reception center at Kuala Lumpur International Airport on March 8. 
Malaysia Airlines official Joshua Law Kok Hwa, center, speaks to reporters in Beijing on March 8. 
A relative of two missing passengers reacts at their home in Kuala Lumpur on March 8. 
Wang Yue, director of marketing of Malaysia Airlines in China, reads a company statement during a news conference at the Metro Park Lido Hotel in Beijing on March 8. 
Chinese police at the Beijing airport stand beside the arrival board showing delayed Flight 370 in red on March 8. 
A woman asks a staff member at the Beijing airport for more information on the missing flight. 
A Malaysian man who says he has relatives on board the missing plane talks to journalists at the Beijing airport on March 8. 
Passengers walk past a Malaysia Airlines sign on March 8 at Kuala Lumpur International Airport. 
Malaysia Airlines Group CEO Ahmad Juahari Yahya, front, speaks during a news conference on March 8 at a hotel in Sepang. "We deeply regret that we have lost all contacts" with the jet, he said. 
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Photos: The search for Malaysia Airlines Flight 370 On Tuesday, Malaysia's Transport Ministry released the transcript of the conversations between the Flight 370's cockpit and air traffic control. The final words from the plane: "Good night Malaysian three seven zero."
Malaysian authorities gave no explanation for the discrepancy between the two quotes. And authorities are still trying to determine whether it was the plane's pilot or copilot who said them.
The final quote is routine and is not a sign that anything untoward occurred aboard the flight, said CNN aviation analyst Mary Schiavo.
But the change in wording weeks into the search for the missing plane raises questions about how Malaysian officials have handled the investigation.
"It speaks to credibility issues, unfortunately," Schiavo said.
"We haven't had a straight, clear word that we can have a lot of fidelity in," said Michael Goldfarb, former chief of staff at the U.S. Federal Aviation Administration. "We have the tragedy of the crash, we have the tragedy of an investigation gone awry and then we have questions about where we go from here."
Malaysian authorities have defended their handling of the situation.
Acting Transportation Minister Hishammuddin Hussein said Monday that authorities were not hiding anything by declining to release some details of the missing flight. Some details are part of ongoing investigations into what happened to the plane, he said.
"We are not hiding anything," he said. "We are just following the procedure that is being set."
Hussein said the transcript released Tuesday offered "no indication of anything abnormal."
Long search ahead
The search for what happened to Malaysia Airlines Flight 370 "could drag on for a very long time," the chief coordinator for the agency organizing the efforts said Tuesday.
"It's not something that's necessarily going to be resolved in the next two weeks, for example," said retired Air Chief Marshal Angus Houston, chief coordinator of the Joint Agency Coordination Centre. The center was established on Monday and was in "setting up mode" on Tuesday.
The search area for the plane is extremely broad, "the like of which we probably haven't seen before," Houston told reporters Tuesday. But "our expectation is that it crashed into the southern (Indian) Ocean."
Sources call MH370 turn a 'criminal act' 
Clock ticking on search for Flight 370 
Timeline of the hunt for Flight 370 
Officials revise last words from MH370 On Tuesday, 10 military planes, a civilian jet and nine ships are taking part in the Indian Ocean search, which spans a swath west of Perth that's 120,000 square kilometers (46,300 square miles), officials said.
The last known position for MH370 was around the Malacca Strait. But the plane apparently flew for several hours after that, and "that's the problem," Houston said.
"Essentially, we do not have any precision in where the aircraft entered the water."
Source: Plane's turn considered 'criminal act'
A Malaysian government source told CNN Monday that the airliner's turn off course is being considered a "criminal act," either by one of the pilots or someone else onboard the missing airliner.
And in a background briefing given to CNN, Malaysian investigators said they believed the plane was "flown by someone with good flying knowledge of the aircraft."
Several friends of Capt. Zaharie Ahmad Shah said they refuse to believe he could have been the "criminal" controlling the plane.
A senior Malaysian government official last week told CNN law enforcement analyst Tom Fuentes that authorities have found nothing in days of investigating the two pilots that leads them to any motive, be it political, suicidal or extremist.
Several leads dry up
Potential leads on the missing Malaysia Airlines Flight 370 keep coming. So do the setbacks and frustrations.
Weeks of searching have yielded nothing. "What we really need now is to find debris wreckage from the aircraft, and that will change the whole nature of our search because we will then be able to employ high technology to help assist us with the underwater search," Houston said.
Monday's search ended without finding anything significant, Australian officials said. Four orange objects spotted by search aircraft and earlier described as promising turned out be nothing more than old fishing gear, they said.
Chinese ships have checked and ruled out 11 locations in the southern Indian Ocean where suspicious objects had been spotted, China's state-run Xinhua news agency reported Tuesday.
U.S. Navy officials loaded underwater locating gear aboard an Australian naval ship and set out to sea Monday evening, but won't be able to use the equipment until investigators narrow the search zone.
The gear includes a pinger locator that's towed behind a ship and scans for the sound of the locator beacon attached to the plane's flight data recorder. Also onboard is an underwater drone that can scan the ocean floor for debris.
It will take the ship, the Ocean Shield, three days just to get to the search zone, leaving precious little time to locate the plane's flight data recorders before the batteries on its locator beacon run out. The batteries are designed to last 30 days; the plane has been missing for 24 days.
Under favorable sea conditions, the pingers can be heard 2 nautical miles away. But high seas, background noise, wreckage or silt can all make pingers harder to detect.
In this case, searchers barely know where to look at all.
Late last week, the search area shifted more than 600 miles after what authorities described as "a new credible lead." But a Wall Street Journal report Monday night, citing anonymous people familiar with the matter, said before that crews had searched for three days in the wrong location due to "lapses in coordination among countries and companies" trying to find the missing jet.
What happened? Andy Pasztor, one of the reporters who wrote the story, said it boiled down to poor coordination between two parts of the investigation: one dealing with satellite data, and the other one dealing with fuel consumption and aircraft performance.
"And so what we're left with is sort of a three-day gap where it's clear that folks were definitely looking in the wrong place," he said.
Relatives' demands
Family members of people onboard Flight 370 have accused Malaysian officials of giving them confusing, conflicting information since the plane vanished more than three weeks ago.
On Monday, dozens of Chinese family members visited a Kuala Lumpur temple. They chanted, lit candles and meditated.
"Chinese are kindhearted people," said Jiang Hui, the families' designated representative. "But we can clearly distinguish between the good and evil. We will never forgive for covering the truth from us and the criminal who delayed the rescue mission."
Hishammuddin said Malaysia will hold a high-level briefing for families where experts will explain some of the data and methodology used to guide the search.
He also said authorities have discussed with the families what happens if they are unable to find debris from the missing plane. But he declined to discuss it with reporters Monday, saying "to be fair to the families, that is something I would not want to share with the public at the moment."
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Jim Clancy reported from Kuala Lumpur; Catherine E. Shoichet and Holly Yan wrote from Atlanta. CNN's KJ Kwon, Barbara Starr, Will Ripley, Richard Quest, Nic Robertson, Sara Sidner, Mitra Mobasherat, Kyung Lah and Yuli Yang also contributed to this report.
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