upgraded research vessel Tangaroa back home

The National Institute of Water and Atmosphere Research (NIWA) today welcomed home the RV Tangaroa, New Zealand's only deepwater research vessel, after a $20 million upgrade to enhance her ocean science and survey capabilities.

Tangaroa is the only ice-strengthened research vessel in the country and NIWA's base for major offshore, international science work. The vessel is 20 years old, and the upgrade will now enable Tangaroa to meet New Zealand's ocean research and survey needs for the next 20 years.

The vessel has spent the last five months in Singapore being extensively upgraded, including the installation of a dynamic positioning (DP) system. This system is fully automated and allows the vessel to remain fixed in a specific position at sea, despite wind, waves, and currents. It also allows the vessel to precisely navigate a straight path.

The system installed on Tangaroa is a DP2 which uses electrically powered thrusters and computerised controls to fix the vessel to a specific area, guided by satellite positioning or transponders on the seabed.

DP2 capabilities are essential for ocean science and marine operations undertaken by oil, gas, and mineral industries, where new technologies often require vessels to hold a steady position. This includes the deployment and use of remotely operated vehicles (ROVs), autonomous underwater vehicles (AUVs), manned submarines, seafloor observatories and other equipment temporarily fixed to the seabed, such as seabed samplers and rock coring equipment. Dynamic positioning is also very important when deploying divers or working around marine construction works, such as oil and gas platforms or pipelines.

There are no other New Zealand-based vessels with DP2 capabilities, meaning New Zealand is becoming increasingly reliant on foreign vessels for marine work requiring precise positioning.

NIWA's General Manager of Research, Dr Rob Murdoch, says the upgrade to Tangaroa provides New Zealand with a valuable asset to help advance ocean science, surveying and exploration. "International demand for research and survey vessels with DP2 capabilities has increased a lot over the last few years, especially with the heightened activity in the exploration industries. By installing the DP2, we can provide these capabilities without companies having to look offshore for foreign vessels to do the job. That's a huge advancement for New Zealand."

"Tangaroa has always had excellent research capabilities, but these improvements will really allow NIWA to meet the future demands of its ocean science and commercial clients. Many oil and gas exploration companies demand dynamic positioning capabilities on vessels as a safety and environmental requirement and now we can provide a vessel locally."

Other improvements to the vessel included installing new laboratories, upgrading air conditioning systems, refurbishing winches, the galley and dry stores, installing a new deep sea winch and a bridge wing to view gear deployments, and stripping and re-painting the vessel.

Tangaroa will remain in Wellington for the next few days to undergo final sea trials, before being deployed on its first voyage of 2011, a fish stock trawl survey over the Chatham Rise.

For those into specifications:

Flag	New Zealand
Call sign	ZMFR
Port of registry	Wellington
Classification	DNV – 1A1 (stern trawler/research vessel) + Ice 1C (light ice: ice floes up to 0.4 metres thick)
Year of construction	1991 – Mjellem & Karlsen Verft, Norway
Length	70.0 metres
Beam	13.8 metres
Draft	7.0 metres
Hull	Steel displacement, ice-strengthened
Gross tonnage	2291 tonnes
Nett tonnage	687 tonnes
Cruising speed	10.5 knots
Main engines	Wartsila Vasa 8R 32D 4023 bhp (2,999 kW)
Shaft generator	Leroy Sommer 900 kVA
Main generators	2 x Cummins QSK60 1800 kW (1,440 kWe)
Harbour generator	Cummins 400 kVA
Propeller	Wartsila Wichman PR 90/4
Bow thruster	Brunvoll 600 kW CPP
Stern thruster	Brunvoll 800 kW CPP
Retractable azimuth	Brunvoll 800 kW CPP
Freshwater capacity	40 cubic metres
Water maker	4-14 cubic metres per 24 hours (approx)
Fuel capacity	620 cubic metres
Accommodation	22 single berths with ensuite 9 double berths with ensuite
Endurance	60 days
Rescue boat	Rigid bottom inflatable SOLAS
Work boat	5.8 metre Naiad inflatable SOLAS