A boy holds a candle during a candlelight vigil to wish for the safe return of missing passengers from the sunken South Korean ferry Sewol, at a park in Ansan April 20, 2014. [Photo/Agencies]

Death toll rose to 64 Monday morning in a South Korean ferry sinking accident as divers kept entering inside the hull of the submerged vessel while ships were scouring the waters.

So far, 64 people have been confirmed dead, and 238 others still missing. The number of the rescued remained unchanged at 174.

The pan-government response center will hold a regular press briefing at 10 am local time to explain overnight rescue operations.

A transcript released Sunday shows the ferry that sank was crippled with confusion and indecision well after it began listing dangerously.

Three times in succession, and about half an hour after the ferry Sewol began tilting on Wednesday, a crew member asked Jindo Vessel Traffic Services Center (VTS) whether passengers would be rescued if they abandoned ship off South Korea's southern coast. That followed several statements from the ship that it was impossible for people aboard to even move, and another in which it said it was "impossible to broadcast" instructions.

Many people followed the captain's initial order to stay below deck, where it is feared they remain trapped."Even if it's impossible to broadcast, please go out and let the passengers wear life jackets and put on more clothing," an unidentified VTS official urged at 9:24 am, 29 minutes after the Sewol first reported trouble, according to the transcript, released by South Korea's coast guard.

"If this ferry evacuates passengers, will you be able to rescue them?" the unidentified crew member asked.

"At least make them wear life rings and make them escape!" the VTS official responded.

"If this ferry evacuates passengers, will they be rescued right away?" the crew member asked again.

"Don't let them go bare - at least make them wear life rings and make them escape!" the VTS official repeated. "The rescue of human lives from the Sewol ferry ... the captain should make his own decision and evacuate them. We don't know the situation very well. The captain should make the final decision and decide whether you're going to evacuate passengers or not."

"I'm not talking about that," the crew member said. "I asked, if they evacuate now, can they be rescued right away?"

The VTS official then said patrol boats would arrive in 10 minutes, though another civilian ship was already nearby and had told VTS 10 minutes earlier that it would rescue anyone who went overboard.

Only 174 people are known to have survived the sinking of the Sewol, which had been on its way from the South Korean port city of Incheon to the southern island of Jeju. The captain took more than a half hour to issue an evacuation order - an order several passengers have said they never heard.Divers, who once pumped air into the ferry in the slim hope that survivors were inside, have yet to find anyone alive there.

The Sewol sank with 476 people on board, 323 of them students from a high school in Ansan. The 16- and 17-year-old students make up only 75 of the survivors, and about 225 of the missing. At least 23 of those confirmed dead are students, according to coast guard spokesman Kim Jae-in.

A 21-year-old South Korean sailor, surnamed Cho, died from injuries he sustained Wednesday while working on a warship going to help rescue passengers in the ferry, said Cmdr. Yim Myung-soo of the South Korean navy.

The heartbreaking task of recovering the bodies led to yet another: identifying them. Information sheets taped to the walls of a gymnasium on Jindo island where families of the missing are staying listed details of the bodies such as sex, height, length of hair and clothing.

It was too little for Lee Joung-hwa, a friend of a crew member who is among the missing. "If only they could have made some kind of image of the person's face. Who can tell who this person is just by height and weight?" Lee said.

A woman with a blue baseball cap shouted complaints at government officials who were seated nearby, working at their desks. "I can't live like this! I'm so anxious!" she yelled. "How can I trust the police?"

Anguished families of the missing, fearful they might be left without even their loved ones' bodies, expressed their rage over the government's handling of the crisis several times Sunday.

About 100 relatives attempted a long protest march to the presidential Blue House in Seoul, about 400 kilometers (250 miles) to the north, saying they wanted to voice their complaints to President Park Geun-hye. They walked for about six hours before some 200 police officers in neon jackets blocked them from continuing on a main road.

"The government is the killer," they shouted as they pushed against a police barricade.

"We want an answer from the person in charge about why orders are not going through and nothing is being done," said Lee Woon-geun, father of 17-year-old missing passenger Lee Jung-in. "They are clearly lying and kicking the responsibility to others."

Earlier Sunday morning, relatives of the missing blocked the car of Prime Minister Chung Hong-won and demanded a meeting with Park as Chung made a visit to Jindo. Chung later returned to the gymnasium, but met only with a number of representatives of the family members in a side office.

On Sunday evening, dozens of relatives who gathered at the port in Jindo surrounded the fisheries minister, Lee Ju-young. They shouted, swore, yelled threats and pushed him as he was on his way to a meeting with other officials.

Relatives are desperate to retrieve bodies before they decompose beyond recognition, Lee Woon-geun said.

"After four or five days, the body starts to decay. When it's decayed, if you try to hold a hand it might fall off," he said. "I miss my son. I'm really afraid I might not get to find his body."

Park and her Cabinet took a step Sunday to secure funding needed for search and rescue work and relief, designating Jindo county and Ansan city - the students' hometown, south of Seoul - as a special disaster zone, coast guard spokesman Kim said.

The Sewol's captain, Lee Joon-seok, 68, was arrested Saturday, along with one of the ship's three helmsmen and the 25-year-old third mate, on suspicion of negligence and abandoning people in need. The third mate was steering at the time of the accident, in a challenging area where she had not steered before, and the captain said he was not on the bridge at the time. The cause of the sinking is not known, but prosecutors said the ship made a sharp turn before it began to list.

Senior prosecutor Yang Jung-jin said the third mate has refused to tell investigators why she made the sharp turn. He said that she had a "psychological shock" and fainted under questioning, but that she told investigators she did not need medical attention.

Prosecutors have not identified the third mate, but a fellow crew member identified her as Park Han-kyul.

Yang said 30 to 40 people have been barred from leaving South Korea while authorities investigate the sinking.

The captain, as he was taken from court in Mokpo on Saturday, had explained his decision to wait before ordering an evacuation.

"At the time, the current was very strong, the temperature of the ocean water was cold, and I thought that if people left the ferry without (proper) judgment, if they were not wearing a life jacket, and even if they were, they would drift away and face many other difficulties," Lee told reporters. "The rescue boats had not arrived yet, nor were there any civilian fishing ships or other boats nearby at that time."

The Sewol made its first distress call at 8:55 a.m. Wednesday to a different vessel traffic services center on Jeju island; the government released that transcript Friday. "It's impossible to move," the ship told the Jeju VTS at 9 a.m., a message it repeated to the Jindo office.

"I can't move even one foot from where I am. I'm holding the wall, barely standing," the crew member who spoke to the Jindo VTS official said at 9:18 am.

By then, a civilian ship was in the area; it told Jindo VTS at 9:14 a.m. that it was ready to help passengers, according to the transcript released Sunday. It is not clear from the transcript whether the Sewol, when it asked about rescue prospects 10 minutes later, realized the civilian ship was nearby.

As the Sewol continued to tilt, the crew member continued to raise questions about the details of an evacuation and rescue. After being told at 9:27 that a helicopter was one minute away, the crew member said, "There are too many passengers. A helicopter is not enough."

At 9:29, the crew member said, "I can see other ships," then asked the Jindo VTS official to tell one of the ships to move from the Sewol's front to its left.

It was not until 9:37 that it was clear to VTS that the ferry had given an order to evacuate: "People are trying to evacuate on their left side. I did broadcast, but it's impossible to move to the left," the crew member said. The ferry's last communication with the official came seconds later.

Prosecutors extend ferry captain's detention as death toll mounts 

South Korean prosecutors investigating last week's ferry disaster said on Sunday they wanted to extend the detention of the captain and two other crew as they try to determine the cause of an accident that likely claimed more than 300 lives.

The Sewol ferry was on a routine 400-km (300-mile) voyage from Incheon to the southern holiday island of Jeju in calm weather on Wednesday carrying 476 passengers and crew, among them 339 children and teachers on a high school outing.

Divers gained access to the hull of the Sewol for the first time overnight and the number of those confirmed dead rose steadily throughout Sunday by 25 to 58 dead with 244 still listed as missing.

A clearer picture started to emerge of the time around the capsize after coastguards released a recording of a conversation between vessel controllers and the ship.

Witnesses have said the Sewol turned sharply before it began listing. It is still not clear why the vessel turned.

It took more than two hours for it to capsize completely but passengers were ordered to stay put in their cabins.

According to the transcript, at 9.25 a.m. the controllers told the 69-year old Captain Lee Joon-seok to "decide how best to evacuate the passengers" and that he should "make the final decision on whether or not to evacuate".

Lee was not on the bridge when the ship turned. Navigation was in the hands of a 26-year old third mate who was in charge for the first time in the passage, according to crew members.

The transcript shows crew on the ship worried there were not enough rescue boats at the scene to take on all the passengers. Witnesses said the captain and some crew members took to rescue boats before the passengers.

Lee said earlier he feared that passengers would be swept away by the ferocious currents if they leapt into the sea, but he has not explained why he left the vessel.

Prosecutor Yang Joong-jin told a news conference in Mokpo, one of the centres for the investigation, that some of the crew said they had not received any safety training.

"We are trying to find out if there is additional negligence," Prosecutor Yang Joong-jin told a news conference in Mokpo, one of the centres for the investigation, speaking of the captain and crew.

When the captain and two crew were arrested on Saturday, they were detained by police for 10 days and prosecutors for a further 10. If the new extension request is granted, they could be detained for 30 days.

Anger and anguish 

Yang said that prosecutors had also summoned 10 other people to give evidence, including other crew from the Sewol and officials from the ferry's owner, Chonghaejin Marine Co Ltd.

More divers managed to gain access to the stricken ship on Sunday as guide ropes were installed to help them through the tricky and fast currents in the area, although for many of those waiting in Jindo the recovery was still not quick enough.

Relatives of those listed as missing, but who are now presumed to be dead, clashed briefly with police when about 100 of them tried to leave the island by a road bridge to the mainland to take their protest to the capital city of Seoul.

Police blocked them and they later turned back.

"Bring me the body," weeping mother Bae Sun-ok said of her child as she was comforted by two policemen at the bridge.

Later on Sunday, the Minister for the Oceans and Fisheries Lee Ju-young was jostled and booed by relatives, more than 500 of whom have spent four days and nights cooped up in a gymnasium in the port city of Jindo, which is the centre of the rescue operation.

Tempers have frayed over the slow pace of the recovery and frequent changes in information.

President Park Geun-hye was booed by some of the relatives when she visited the gym on Thursday.

Pupils at the school in Ansan, a gritty commuter town, set up shrines to the dead and posted messages for the missing.

The vice-principal of the school, who was on the ferry and survived the capsize, hanged himself outside the gymnasium in Jindo in another blow to the school. His body was discovered by police on Friday.

The sinking looks set to be the country's worst maritime disaster in 21 years in terms of loss of life.

S. Korean president: captain's deserting ferry amounts to 'murder'