![](https://flightsafety.org/wp-content/uploads/2022/06/hems-seminole-Screenshot-2022-06-09-115303.jpg)
Citing an event in which an emergency medical services (EMS) helicopter and a Piper Seminole on an instructional flight came within 451 m (1,480 ft) of each other in the clouds near Mangalore, Victoria, Australia, the Australian Transport Safety Bureau (ATSB) is emphasizing “the effective use of radio” in avoiding midair collisions.