“…5 However, the limited space, movements, and vibrations could interfere with CPR quality and might be dangerous for the rescuer. 1,6,7 Some studies have assessed the CPR quality delivered by helicopter health staff and the impact of feedback devices, observing a relatively good in-flight CPR quality. 1,8 In countries like Spain or Sweden, offshore rescue helicopter crews do not include medical/ nurse staff, but they do include professional lifeguards or rescue divers; unfortunately, we lack data about the CPR performance of these nonhealth emergency staff.…”