A pair of United States pilots who ejected from an F-15E aircraft inside Iranian territory were able to maintain covert contact with rescue teams using advanced survival technology, according to details circulating in defence discussions.

The aircrew reportedly relied on a compact survival radio known as the Boeing Combat Survivor Evader Locator (CSEL), a device designed to function immediately after ejection and operate under hostile conditions.

Rather than using open voice communication, the system transmits short, encrypted data bursts containing key information such as location, injury status and nearby threats. These signals use frequency-hopping technology, making them difficult to detect or intercept.

The device connects directly to military satellites, allowing rescue teams to receive real-time updates while minimising the risk of exposing the pilots’ position.

Full beacon transmission is typically delayed until extraction forces are close, reducing the likelihood of enemy detection.

Military analysts say such systems are designed to enhance survivability in contested environments by enabling downed personnel to remain concealed while still being tracked by friendly forces.

The incident underscores the role of modern communication and recovery technologies in combat operations, particularly in situations where personnel may be isolated behind enemy lines.