The official electronic charts of the New Zealand
Charting Area are also free - these cover New Zealand
, Tokelau, Cook Islands
and the small scale and planning charts for the whole of the Pacific.
These are currently all raster charts however (ENC's start coming out later this year) so one needs to use one of the electronic charting systems on ones notebook that handles encrypted official raster charts - most applications aimed at pleasure sailors do not, but those that do are often cheaper than the pleasure sailor ones, so go figure. Details are available on the Land Information NZ (LINZ) web site.
High resolution TIF images
of all these charts are also available free on the same site and are able to be used in the likes of the free SeaClear charting application but unlike the official charts these images
are not maintained in corrected form.