Transmedium Travel: Reality, Uncertainty, and Speculation Across Water, Air, and Space
To the point
There is no proven craft that can travel seamlessly through water, air, and space, despite rumors of transmedium vehicles and speculative ideas like warp bubbles.
Transmedium crafts spark interest because they allegedly move across water, air, and space without conventional flight surfaces, a capability that would hold military value across three domains. In reality, nothing like that exists; we can observe transitions between space and air in some contexts, but not a seamless ability to traverse all three zones on demand. The military landscape includes Space Command (Guard), the Air Force, Navy, and Army, yet no craft is credibly demonstrated to shuttle freely among space, air, and water. Some accounts describe USOs that appear to move willy-nilly between domains, but the evidence remains uncertain. The last time such movement was supposedly observed across earth, water, and air, it was in a vintage TV show featuring a submarine and a UFO-like craft, underscoring how far fantasy can stretch. There are claims of underwater USOs traveling hundreds of miles per hour without cavitation and with little audible signature, a combination that would imply an extraordinary propulsion and mode of motion. The central question is what propulsion could work both underwater and in the air, enabling such mobility. Some speculate a warp bubble that would effectively ignore water, suggesting mechanisms that could even allow passage through mountains, though these ideas remain speculative.
Source: youtube.com