Families of four Australian Defence Force personnel who die after a helicopter crash in Queensland have launched a class action, according to multiple reports. The deceased were Australian Defence Force members participating in a training exercise when their helicopter plunged into the ocean off Queensland. All three outlets describe the incident as involving four ADF personnel and note that the aircraft went down during the course of training. The class action is brought by the families of the victims, seeking legal remedy related to the deaths. While details of the claims, defendants, and legal basis are not provided in the excerpts supplied by the sources, the reporting is consistent on the core facts: the number of fatalities and the circumstances of the crash during a training activity in Queensland waters. The reports frame the class action as a collective legal step taken by relatives following the deaths, with the helicopter crash remaining the central event.