| Chart NZ 5318 Great Mercury Island (Ahuahu) to Otara Bay | New Zealand Hydrographic Authority | Land Information New Zealand | Creative Commons Attribution 4.0 International | Layer | Raster | 11740 | 620 | ||
| Water turbulence polyline (Hydro, 1:22k - 1:90k) | New Zealand Hydrographic Authority | Land Information New Zealand | Creative Commons Attribution 4.0 International | Layer | Vector | 5145 | 95 |