A cable-free underwater radio headline becomes more useful when it explains where the signal travels. Marine Technology News discussed Saltenna’s recent conference paper on October 22, 2026. The practical question for divers following this research is whether a reported link depends on a particular surface, water condition or depth.
Keep the research dates separate
The IEEE-deposited publication record identifies a paper by John Mulholland and Igor I. Smolyaninov about shallow water, ice and submerged infrastructure. It belongs to the September 1–3 UComms conference; its DOI record was created on October 15. The October 22 industry coverage is a later discussion. These dates describe different steps, rather than an October 22 invention.
An earlier experiment explains why conditions matter
A separate, openly readable Scientific Reports study published on August 26, 2025, involving Saltenna researchers, examines radio-frequency surface-wave behavior. Its experiments distinguish freshwater, pool-water and near-surface seawater conditions. One seawater result used antennas only 0.15 metres underwater. That specific depth matters: the same observation cannot establish performance between divers much farther below the surface.
The paper also relates behavior to conductivity, frequency and the interface between materials. This is a useful explanation of the research direction, rather than a specification for any radio placed inside a waterproof box. It is the earlier study, not a substitute description of every test in the 2026 conference paper.
Read a link as a complete system
Saltenna’s current communications page describes development across water, ice and other difficult environments. That broad development aim does not give a recreational diver a complete operating envelope.
For any demonstration, look for a diagram locating both antennas, the water surface and nearby structures. Then check the water’s conductivity, the transmitted signal and the measured outcome. Receiving intelligible speech, sending a small sensor message and carrying continuous video are different tasks. A comparison is informative only when it states which task was tested.
Our editorial reading is that the route is as important as the distance. A link guided by an interface poses a different engineering question from transmission through an unrestricted volume of water. Neither a headline nor a long surface separation tells the whole story.
The accessible record here does not support a numerical performance claim for the new conference work. Treat this as research to follow, rather than a verified replacement for established dive communications. Our underwater technology evidence checklist offers a way to separate a demonstrated function from an assumed capability.
Checked October 26, 2026. Conference event: September 1–3; DOI registration: October 15; discussion: October 22. The older experimental study is dated explicitly above.
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