While offering the mini-submarine as a potential savior, Musk used the opportunity to promote space exploration. Just returned from Cave 3. Elon Musk SpaceX Tesla ThailandAmerican space entrepreneur Elon Musk tweeted that he was in Thailand on Tuesday with a prototype mini-sub, at the flooded cave where five members of a youth football team remained trapped. There is no indication so far that Thai rescuers plan to use Musk’s prototype. Leaving here in case it may be useful in the future.” On Instagram, he published video of a flooded cave, with rescuers. which is developing tunneling systems for transport projects. “Mini-sub is ready if needed. The person inside need not swim or know how to use oxygen bottles. Congratulations to an outstanding rescue team! Simulating maneuvering through a narrow passage pic.twitter.com/2z01Ut3vxJ — Elon Musk (@elonmusk) July 9, 2018 By Monday night, elite divers had managed to bring out eight members of the football team which included 12 boys and their 25-year-old coach. The footballers still awaiting rescue are about two kilometers further in, at a point very difficult to access. The Thai soccer team ventured into the Tham Luang cave complex after practice and became trapped by rising waters more than a fortnight ago. Testing underwater in LA pool pic.twitter.com/CDO2mtjP2D — Elon Musk (@elonmusk) July 8, 2018 Last week, Musk said he was sending teams to Thailand from his private space exploration firm, SpaceX, and engineering firm, Boring Co. It is made of rocket parts & named Wild Boar after kids’ soccer team. He posted video of divers escorting the pod during testing in a Los Angeles swimming pool. It is made of rocket parts & named Wild Boar after kids’ soccer team. He is also co-founder of the Tesla electric car company. — Elon Musk (@elonmusk) July 10, 2018 “Just returned from Cave 3,” Musk said. Thailand is so beautiful. Mini-sub is ready if needed. Leaving here in case it may be useful in the future. pic.twitter.com/EHNh8ydaTT — Elon Musk (@elonmusk) July 9, 2018 Cave Three is about two kilometers (1.2 miles) from the entrance of the cave network and is the base for Thai rescuers. He called it “basically a tiny, kid-size submarine using the liquid oxygen transfer tube of (a) Falcon rocket as hull.” pic.twitter.com/D1umiFDr1t — Elon Musk (@elonmusk) July 8, 2018 Musk said it was light enough to be carried by two divers, robust, and small enough to get through narrow gaps. Great news that they made it out safely. After garnering headlines with initial ideas of installing a giant air tube inside the cave complex and using his firm’s penetrating radar to dig holes to reach the boys, Musk offered his idea for the mini-sub. The Thai rescue effort has been assisted by experts from around the world, and the death of a former Thai Navy SEAL diver who ran out of oxygen in the cave on Friday underscored the dangers of the mission.