Based in Nelson New Zealand, we provide specialist hydrographic services to the port and harbour sector.
Southern Hydrographic uses specialist equipment capable of obtaining accurate and extremely high detail of the underwater environment.
High resolution MBES is an effective and efficient tool to support port and harbour dredging.
Accurately determine what needs to be dredged to achieve the design profile, including associated volumes.
Monitor dredge progress using intuitive conformance plots generated immediately after MBES surveys. Enables targeted dredge operations and minimise unnecessary work.
Confirm desired design profile has been achieved. Calculate accurate dredge volumes, including overdredge allowance. Production of detailed survey report and user-defined plots to LINZ nautical charting standards.
Accurate and timely hydrographic surveys underpins safe navigation in NZ ports and harbours. Southern Hydrographic regularly undertakes surveys compliant with LINZ Nautical Charting standards and National Good Practise Guidelines.
High resolution MBES survey carried out to the same precision as standard dredge monitoring surveys but with additional QA reporting and specific deliverables to satisfy nautical charting requirements.
Use of high resolution MBES to examine areas critical to navigation and ensure the position, extent and least depth of potential hazards are identified.
Provision of high density and accurate hydrographic data that can be seamlessly incorporated into PPU’s
Southern Hydrographic uses high resolution MBES to acquire accurate and detailed information of underwater infrastructure. This can be utilised in a number of ways, such as:
Compare actual placement of rock material against user defined 3D design model.
Monitor condition of underwater infrastructure through comparison of repeat surveys.
Identify and position objects such as fenders or other debris.
Aids to Navigation (AtoN) such as navigation buoys and beacons, are a key component to any port’s infrastructure. Southern Hydrographic provides the following services to support the commissioning and operation of AtoN and associated equipment:
Accurately determine the position of buoys (ie seabed mooring) and beacons, including verification of light characteristics and elevation above MHWS.
Alignment of sector lights with design azimuth(s) together with field verification and documentation.
Tide Gauge calibration: Establish vertical connection of tide gauge zero with Chart Datum (CD), validate gauge data using LINZ approved methodology (also a recommended activity under the NZ Hydrographic Guidelines)
SHL was established by Dave Mundy, a professional hydrographic surveyor with over 30 year experience delivering surveys in NZ and the pacific, and has been in operation since 2019, delivering hydrographic survey services to the NZ Port and Harbour sector.
All surveys are undertaken by personnel holding appropriate professional qualifications, including International Hydrographic Organisation (IHO) Category A and Certified Professional Hydrographic Surveyor (CPHS) Level 1 certification.
