PICTURED: Members of the 12 missing crew on Seacor Power lift boat that ...

Photos have emerged of some of the 12 missing crew members who could be trapped inside a capsized lift boat off Louisiana, as the Coast Guard prepares to make a last-ditch rescue attempt.  

Divers searching for the missing oil industry workers prepared to enter the overturned vessel on Friday, a rescue effort complicated by daunting technical challenges and continued bad weather.

The hope is that the 12 missing men have found air pockets to survive inside the Seacor Power, most of which is submerged in 50-foot seas about eight miles off the Louisiana coast.

'As long as the weather permits, the divers will try to gain to access to the vessel. That is the ultimate goal,' Coast Guard spokesman Carlos Galarza said early Friday.

Divers searching for the missing oil industry workers prepared to enter the overturned oil drilling vessel Seacor Power on Friday, a rescue effort complicated by daunting technical challenges and continued bad weather

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Divers searching for the missing oil industry workers prepared to enter the overturned oil drilling vessel Seacor Power on Friday, a rescue effort complicated by daunting technical challenges and continued bad weather

Captain David Ledet, 63, was confirmed dead in the boat disaster

Gregory Walcott, 62, was still missing on Friday

Captain David Ledet, 63, (left) was confirmed dead in the Seacor Power boat disaster and Gregory Walcott, 62, (right) remained among the missing on Friday as the Coast Guard prepared a last-ditch rescue attempt

Missing crew member Dylan Daspit is seen with wife Hannah Coleman Daspit. One crew member is confirmed dead and 12 more are missing from the commercial vessel that capsized Tuesday near Port Fourchon with 19 people on board

Missing crew member Dylan Daspit is seen with wife Hannah Coleman Daspit. One crew member is confirmed dead and 12 more are missing from the commercial vessel that capsized Tuesday near Port Fourchon with 19 people on board

Missing crew member Jay Guevara

Jay Guevara with fiancee Krista Vercher

Missing crew member Jay Guevara is seen left and right with fiancée Krista Vercher. Divers searching for the missing oil industry workers prepared to enter the overturned vessel on Friday

Missing crew member Quinon Pitre, 31. After the ship flipped over in hurricane-force winds on Tuesday, six crew members were rescued, and one was confirmed dead

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Missing crew member Quinon Pitre, 31. After the ship flipped over in hurricane-force winds on Tuesday, six crew members were rescued, and one was confirmed dead

People talk on a balcony at a fire station where family members of 12 people missing from a capsized oil industry vessel have been gathering on Thursday in Port Fourchon, La. The lift boat capsized in the Gulf of Mexico during a storm on Tuesday

People talk on a balcony at a fire station where family members of 12 people missing from a capsized oil industry vessel have been gathering on Thursday in Port Fourchon, La. The lift boat capsized in the Gulf of Mexico during a storm on Tuesday

After the ship flipped over in hurricane-force winds on Tuesday, six crew members were rescued, and one was confirmed dead. Twelve others remain missing. 

Two of the missing men had been communicating with rescuers by VHF radio after the ungainly platform ship capsized.  

They were spotted clinging to the overturned hull, but returned to seek shelter inside after a third man fell into the water and was lost. There have not been any signs of life since then, officials said.

Time is of the essence, because air pockets will eventually become depleted of oxygen, said Mauritius Bell, diving safety officer at the California Academy of Sciences.

Surviving could depend on the size of an air pocket. 'The larger the better, and it's all about time,' Bell said.

'It would be somewhat analogous to breathing in and out of a paper bag,' he added. 'At some point, it's not survivable.'

On Thursday, searchers knocked on the ship's hull without response.

'There is the potential they are still there, but we don't know,' Petty Officer 2nd Class Jonathan Lally said Thursday. 'We're still searching for 12 people because there are 12 still missing.'

Darra Ann Morales shows a photo of her missing son Chaz Morales and his family on her phone

From right to left, Chaz Morales with children Valerie, Jaxon and Chaz Jr.

Mother of missing crewman Chaz Morales shows a family photo of him with his children Valerie, Jaxon and Chaz Jr

Darra Ann Morales shows a photo of her son Chaz Morales, as his son Chaz Jr., 10,  looks on at the family home in Slidell, Louisiana on Wednesday. Chaz Morales is one of the crew members missing from the capsized vessel Seacor Power

Darra Ann Morales shows a photo of her son Chaz Morales, as his son Chaz Jr., 10,  looks on at the family home in Slidell, Louisiana on Wednesday. Chaz Morales is one of the crew members missing from the capsized vessel Seacor Power

Marion Cuyler, fiancée of missing crew member Chaz Morales, talks on her cell phone at a fire station where family members of 12 people missing from a capsized oil industry vessel have been gathering in Port Fourchon

Marion Cuyler, fiancée of missing crew member Chaz Morales, talks on her cell phone at a fire station where family members of 12 people missing from a capsized oil industry vessel have been gathering in Port Fourchon

Marion Cuyler, fiancée of missing crew member Chaz Morales

Chaz Morales, right, is seen with a friend

Marion Cuyler (left), fiancée of missing crew member Chaz Morales (right) is among the family members waiting desperately for news of their loved ones from the capsized Seacor Power

Relatives of the missing gathered at a fire station at Port Fourchon, a sprawling base for much of the offshore oil and gas industry in the Gulf of Mexico.

The port, busy with cranes, cargo and heavy equipment, is where workers from across Louisiana and beyond load up on a fleet of helicopters and ships that take them to the rigs for long stretches of work.

Marion Cuyler, who is engaged to crane operator Chaz Morales, wavered between optimism and fear after the relatives got closed-door briefings

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