Dean Sanderson’s loved ones told an inquest the 50-year-old father’s horrific death in Far North Queensland was an avoidable tragedy.

A widow has gasped as an operations manager testified he was unaware of multiple alleged safety standard breaches at a zipline where her husband fell to his death.

A grieving family has demanded accountability after an inquest was told zipline staff were unaware of safety requirements before a beloved man plunged to his death.