Why is a rescue attempt so risky? "So it's a really quite a strenuous environment to be in".
The divers will use a static rope attached to the cave walls to help guide each boy one-by-one through the cave system of completely flooded chambers and those with air pockets.
An experienced SEAL diver takes around six hours to navigate the rugged, flooded kilometres-long course towards the entrance.
What can Thai authorities do - or not do?
Thai officials said they are working on installing electricity and a fiber optic phone line in the cave so the boys can speak with their families waiting anxiously outside.
With these factors in mind, Thai Navy SEALs are now rushing to teach the adolescents how to properly dive. And the terrain is vastly different [in the cave] - visibility down to one foot at best (30 centimeters), confined spaces, all sorts of underground obstacles to concern yourself with as well.
Rescue teams are working in extremely hard conditions. Rescue workers are now able to walk through a 1.5km (0.9 mile) stretch from the entrance to what's being called the third chamber.
Officials have ruminated on the possibility of the boys remaining in the cave until the monsoon season passes in three or four months. They will be brought out gradually.
It was unclear what the options were to get the "Wild Boar" team out of the Tham Luang caves in Chiang Rai Province and how they would be steered through tight, fluid conditions and uncertain weather.
Thai authorities have warned that the scuba dive can not be made until a doctor rules that the children have recovered, after starving for ten days. The currents are so strong underground in places.
"We can't risk more flooding", Narongsak said.
Experienced divers are wary of taking out the boys through the dark and unsafe waters still in the cave, especially since they are untrained.
Russian Federation stun Spain on penalties to reach World Cup quarter-finals
Spain dominated the match in terms of possession and territorial domination but posed very little threat to the host nation. The last 10 minutes of the match I lost 10 years of my life but in the end, we are through to the quarterfinal".
Gary Mitchell is the assistant chairman of the British Cave Rescue Council, which is involved in the search and rescue efforts in Thailand.
The boys, aged 11-16, and their 25-year-old coach disappeared after they went exploring in the Tham Luang Nang Non cave in northern Chiang Rai province after a football game on June 23.
Authorities are evaluating their readiness each day and if there is any risk, will not proceed, he said.
After a heart-breaking loss to Belgium in the round of 16 of the FIFA World Cup in Russian Federation, the Japanese men's national team also offered support to the young men trapped.
The video lasting about a minute was recorded some time on Tuesday and was posted on the navy Seal Facebook page on Wednesday morning. The boys had moved 400 meters further in as the ledge had become covered by water.
But the largest problem for now is the water levels. Getting trained divers in is easier than getting untrained kids out.
The boys were in good spirits despite spending nearly two weeks underground, Chiang Rai governor Narongsak Osottanakorn said on Thursday.
As the entire nation is glued to the media coverage of the rescue mission, Thai authorities insist they will not compromise on the safety of the trapped group. "We have to see they are ready", he explained. Seven members of Thailand's navy, including two medics, are working with the pair to free the boys.
"We are no longer digging - we will find a way that can give us access (without digging) direct to the area where the boys are", he said.
"He could meditate up to an hour", she said.
Why it is proving hard to extricate Thai cave boys What next?
Thai rescue personnel pump water from Tham Luang cave. Another option would be to drill a hole into the cave and airlift the boys out.