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.Adelaide father Dean Sanderson died on October 22, 2019 after falling up to 25m from a malfunctioning zipline into rainforest terrain in Far North Queensland. His wife Shannon Sanderson was also seriously injured in the fall.The pair were on their “bucket list” holiday at Cape Tribulation, 140km north of Cairns, when they took the Jungle Surfing Canopy Tours tandem zipline experience.“This was not a freak accident; this was a tragedy waiting to happen,” Mr Sanderson’s daughter Jessica told Brisbane Coroners Court at an inquiry into her father’s death.“Dad’s death was avoidable.“The immense pain and suffering to those who knew and loved Dad: avoidable.“The trauma inflicted to those who were present on the tour that day: avoidable.”The young mother spoke of her father’s commitment to his family, work and community.“Dad was meticulous with everything he did in life,” she said.“He taught us that when you do something you do it properly the first time, you don’t take short cuts, you don’t look at loopholes, you just follow the process and the rest will take care of itself.“It is unbelievable, even after six years, that Dad died because proper processes weren’t followed by those qualified to do so, and the safety of employees and tourists was not their biggest priority.” Mr Sanderson died before meeting his granddaughter, Lily, now four years old.A picture of the little girl at her grandfather’s grave was shown to the court as Mr Sanderson’s family shared their story.“He had so much of his life ahead of him, including walking me down the aisle on my wedding day and becoming a grandfather to my children,” Jessica said.“The impact of this tragedy and the loss of my father is felt by those who where not even born at the time.“It is cruel that to spend time with one of hers Lily has to visit his special garden in the cemetery instead of running into his arms.“Birthdays, Father’s Day, Christmas, Easter and family holidays are a cause of pain and suffering, making my heart, our family, incomplete.”Jessica told the court she now suffered “debilitating anxiety” and “crippling fear” that her family would experience more pain – something she never thought possible in Australia.“I never realised how much I relied on my Dad until he was taken from me and my family,” she said.“You don’t expect a tragedy like this to happen in Australia.“Let this tragedy and my Dad’s death be a line in the sand.“Everyone deserves the opportunity to experience our beautiful country, but they also deserve the opportunity to go home to their family at night.”During the inquest, which first began in March and resumed on Monday, the court was told various staff were unaware of certain regulations and safety processes required to ensure compliance.Mr Sanderson’s father Roger Sanderson told the court how his family felt abandoned and ignored by the tour operators.“Our family lost a beloved son and father. Apart from this inquest, we continue to feel that justice has not been served,” he said.“Our family continues to ask this question: How could this happen in Australia?“Those who failed to act with appropriate diligence, responsibility, accountability and humanity should be recognised as having fallen short of the standards.“Shame on all of you.”His sister, Emma McCrae, said the inquest had revealed details and insights the family were not privy to beforehand.“I feel so cheated and blindsided from what we have heard from this inquest,” she said.“I’ve lost my sibling, I should have had him for so much longer. The pain will stay with me forever.“It leaves me questioning how so many people have been able to move on with their lives without consequence and leave us in deep pain.”At the time of Mr Sanderson’s death, Jungle Surfing Canopy Tours was owned by Keydane Pty Ltd, which has since gone out of business and is no longer operating. Coroner Wayne Pennell will return his findings at a later date.