The first court date to decide how class action will proceed will take place on May 5.
The government says NZ has to face up to difficult questions as it adapts to the extreme of climate change.
The grandson is not a party to the case but has been given a QC.
Scarcely a week after the death of a stevedore at Ports of Auckland, Maritime NZ has been called to another fatality - this time at Lyttelton Port.
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