"I feel so sorry for my child, thinking how he suffered, I wasn't there to offer him anything," Lim Young-jae, who lost his son in the Sewol ferry disaster, told CNN.
The Sewol sank on April 16, 2014, killing 304 people -- mostly teens on a school trip. Nine bodies are still missing; it is hoped they will be recovered once the vessel is out of the water.
Jang Dong-won voiced the frustration many of the victims' parents feel that the salvage operations have taken this long.
"It's the first time in three years I've seen the ferry with my naked eye, and it's hard to understand why we couldn't lift it before," he said.
"The priority is to find the missing bodies and do the least damage to the ship so we can find the truth and the reason it sank."
Marathon operation
Speaking Thursday, Lee Chul-jo, head of the Sewol salvaging committee, said that 450 people were working on the vessel, including 50 divers.
They are attempting to stabilize and secure the ship so it can be lifted 13 meters (42 feet) out of the water, after which it will be attached to a barge and towed to land.
Lee said the Sewol is expected to be returned to Shin Port in nearby Mokpo city around April 4, weather conditions depending.
For many of the families of the victims, the wait for answers has been agonizing.
"My son was the 220th body to be found, after 16 days," said Shin Chang-sik. "I can't imagine how the children were shouting and calling for their mother and father on the ship, I feel sorry for him and at the same time I am sorry (I couldn't be there)."
Shin said the disaster "feels like yesterday."
"My days stopped on April 16, 2014. I would do anything to turn the clock back to April 15th," he said.
National trauma
Family groups and opposition politicians have long called for the Sewol's recovery and a full investigation into its sinking.
The incident was a black mark on the presidency of Park Geun-hye, who appeared to be absent during the unfolding disaster, not addressing the nation until seven hours after the ferry began taking on water.
CNN's Taehoon Lee contributed reporting.