My takeaway is that the NZ "Navy" is not an actual military branch, and cannot be trusted not to sink their ships and kill their sailors suggesting a battle efficiency of something very close to zero. My guess is that all those redactions aren't even secrets, but even more embarrassing circumstances than even the clown show we know.
NZ is a small island nation at the bottom of the world, who’s entire defence strategy is:
-be too far away to easily attack
-be to small to be worth attacking
-hope that Australia will come to the rescue should an attack ever occur
It logically follows that the entire military is a joke as they don’t take their role in the world seriously.
Outside of disaster relief in the panic islands (which is increasing difficult as their planes are never serviceable) and the SAS, the military in general is beyond a joke.