A search has been under way to find an expensive high-tech monitoring buoy and mooring which vanished from the edge of the Kāpiti Marine Reserve.
The buoy and mooring, worth about half a million dollars, was positioned in late November and has provided real-time measurements on currents and waves, salinity, oxygen and chlorophyll, water temperature, sediment, wind direction and speed.
But on Sunday, March 28 at 1.10pm the buoy stopped transmitting data.
The buoy had been programmed to 'phone home' if it drifted from its mooring or suffered damage, but no alerts at the time, or since, had been received.
Department of Conservation (DoC) principal marine science adviser Dr Megan Oliver said the disappearance had been a "complete mystery", especially considering how robust it was.