The School has a number of methods available for mapping beneath the water depending on accuracy required and depth of water.
Muritai
Introduction
The Muritai (Maori for Sea Breeze) is the schools 6m Stabicraft boat used for surveying and deployment of various coastal sensors. Purchased in 2010, the Muritai has been used for a number of bathymetric surveys around Canterbury and High Country Lakes round the South Island. The School's boat operator Nick Key is licensed to operate the vessel in all coastal waters around New Zealand and in all lakes where power boats are allowed.
The Muritai has a Bathyswath system mounted to it. This is an amazing system which can allow bathymetric data to be collected at a much faster rate across a wide swath width. The operating swath of the bathymetric system ranges from 15 to 20 times water depth in depths less than 15m.
The Muritai also has a custom built sea chest for our single beam transducer which makes for extremely good (low noise) soundings, while our RTK Trimble R8 GNSS setup allows us to compensate in realtime for tide and heave.
There is a 100kg Davit crane for deploying equipment like ADCPs and our S4 current meter. The closed cabin allows us to operate in all types of weather at all times of the year.
Latest projects
- Avon/Heathcote Estuary mapping
- Lyttelton Harbour mapping
- Lake Te Anua monitoring