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In 2369, a series of class-4 probes was also launched by the USS Enterprise-D to study the far side of a newly-discovered Dyson sphere, after the rescue of Montgomery Scott from the USS Jenolan. (TNG: "Relics") Later that year, the starship also launched a class-4 probe to investigate a molecular reversion field encountered by the shuttlecraft Feynman. (TNG: "Rascals")
In 2372, a Jadzia Dax proposed using a class-4 probe to test whether an artificial wormhole, created by Lenara Kahn and her team, was stable enough to allow starship travel. Dax believed this class of probe would provide a more accurate assessment because its shielding was similar to that on a starship. (DS9: "Rejoined")
In 2373, a class-4 probe was used to transmit a location signal, as well as several farewell recording from the crew of the USS Defiant, after being trapped behind an energy barrier surrounding the planet Gaia. (DS9: "Children of Time")