Two weeks and four days later, that doesn't seem to be the case.
They appear to have used a buddy diving system.
Musk's team will be heading to the Tham Luang Nang Non cave complex in Thailand tomorrow. Experts from around the world, including the United Kingdom, U.S., China and Australia, have traveled to Thailand to join the rescue effort.
The ambulances were seen Sunday evening, but it was unclear who was inside them. He said the operation began at 10 a.m., and it will take at least 11 hours for the first person to be taken out of the cave.
Having gone without food for a week and a half before their whereabouts was discovered, the boys and their coach are not yet strong enough to attempt escape.
The missing team members who had been missing since last month were found by a pair of British cave divers late Monday. "I feel optimistic they will come out soon alive".
However, the dive is complex - with one Navy SEAL dying during the rescue efforts - and numerous boys do not know how to swim.
Billionaire space adventurer and carmaker Elon Musk has offered his services to the Thai government to rescue 12 boys and their football coach trapped in a flooded cave. That's the name of the young boys' team.More news: UFC 226 Heavyweights Weigh-in: Derrick Lewis Shoves Francis Ngannou
Authorities are now pumping water from the cave before forecast rain hits the northern region tomorrow.
But before coming out of the cave the 12 boys and a soccer coach got trapped by flood water.
It is not clear whether the Thai government is willing to use Musk's solution as opposed to the expertise of its divers.
Narongsak says the rescue mission was launched because floodwaters inside the cave are at their most optimal level.
Chiang Rai governor Narongsak Osottanakorn said conditions are "perfect" to stage an evacuation in the coming days before fresh rains and a possible rise in carbon dioxide further imperil the group.
However, the most remarkable achievement highlighted by Tesla is a recent confirmation by the company that it achieved the targeted "5,000 units per week" production rate for the Model 3 at the end of the April-June 2018 quarter.
Mr Narongsak said the boys were "OK" and the air they were breathing was good.
Bloomberg also reported that Musk's representatives are discussing with Thai authorities on how they could help.