A painting of the grounding of HMS BUFFALO Image: Mercury Bay Museum
THINGS THAT GO BEEP IN THE ESTUARY A five-person hydrographic team from HMNZS MATATAUA has combined the firsttime trial of new capability with a museum’s quest to discover parts of a 19th century shipwreck.
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Navy Today #265
Last year the Mercury Bay Museum in Whitianga, Coromandel, in collaboration with the HMS BUFFALO Re-examination Project, contacted the Navy to request help in finding cannons and anchors from doomed Royal Navy vessel HMS BUFFALO, which was driven ashore at Whitianga during a cyclone in 1840. The museum believes the ship’s cannons and a remaining anchor were thrown overboard in a last-ditch attempt to save the ship. The BUFFALO wreck still exists as a protected archaeological site, but the museum hoped to locate the ditched items. They asked the Navy if a team would be willing to collaborate on a magnetic and sonar survey of a large area where the debris could lie. HMNZS MATATAUA were keen for the training opportunity, possessing new side-scan sonar technology and having recently acquired a magnetometer.
Petty Officer Hydrographic Survey Technician Luke Morris and his team—Able Hydrographic Systems Operator Katie de Jong, AHSO AnaMarie Conroy, AHSO Thomas Sullivan and Ordinary Hydrographic Systems Operator Hailey Brown—spent three weeks in March surveying a strip four kilometres long and 500 metres wide, a target set by the museum as the likely ‘wrecking event’ area, with a lot of extra metres built in for error. And while they haven’t confirmed anything yet, they achieved some readings that the museum will dive on for further investigation. POHST Morris says the brand-new kit worked well. MATATAUA also operate the larger REMUS 100 Autonomous Underwater Vehicles, also with side-scan sonar, to scan the sea floor for objects that sit above it. Each REMUS can be programmed to scan a set area by itself before returning. That sounds ideal, but it produces hours of data to process.
