Image
In this close-up of the entrance to Manukau Harbour you can see the treacherous nature of the channel just off Whatipu.
Using this item
Reference: MapColl-832.12aj/1853/17246
Permission of the Alexander Turnbull Library, National Library of New Zealand, Te Puna Mātauranga o Aotearoa, must be obtained before any re-use of this image.