The family of a worker killed at the Port of Lyttelton on Saturday morning say he had only just begun work and was rebuilding his life after his marriage failed.
Warren Ritchie, 49, died after being struck in the chest by machinery while in the hold of a vessel berthed at the port.
His mother, Helen Dungey, 68, said the family was struggling with the loss of a "caring and gentle man".
"He had been hit very hard by the break-up with his wife, it broke his heart, and he had spent a year wallowing, really," Ms Dungey said.
Unions have called for a review of health and safety at the Port of Lyttelton after Mr Ritchie's death and the death last month of contractor Bill Frost.