RV
Have they indicated where they are looking at placing you?
If you are looking at a domestic airport, the pay and cost of living is "a bit" different to the radar centre (only one) in Christchurch.
I suggest you ask for more info from Airways as to their intention for you and then post on here and I will do my best to explain.
If they are looking at the Radar Centre, you need to be aware that each sector (eg Auckland, Ohakea, Wellington, etc) gets a different allowance in lieu (AIL) based on your salary, and these differ greatly. eg Auckland 32%, Ohakea 21% - and if the hot goss is correct the Ohakea sector's AIL is about to be cut to 15/16% (or thereabouts) due to a change of their hours of service. So in other words, the take home pay of each sector is different, even tho' the base wage is the same.
As a result of the last wage round, from 1 April next year this AIL will attract superanuation contributions from Airways (the max you can super is 6% of your pay).
Hope this helps
Cheers
SAS