For more than two decades, a quiet but powerful platform has been working behind the scenes to support Navy missions across the globe.

Known as Bluelink, this Australian-developed system takes raw ocean data and turns it into an operational ocean forecast – giving the ADF a detailed picture of the seas they sail through.

Bluelink provides a suite of modelling capabilities and data products to help ADF personnel understand, anticipate and exploit the maritime environment.

Much like weather forecasts for the ocean, the system’s live data and models allow Defence to identify optimal zones for sonar use, or to adjust navigation routes to harness favourable ocean currents.

Using Bluelink, Navy can identify the fine-scale ocean features that impact sonar performance, and that knowledge works both ways. It doesn’t just help Navy find other vessels, it helps Navy ships avoid counter-detection by identifying regions where sonar performs poorly.

The live feed also allows vessels to predict how shifting currents will impact navigation and mission timing.

Defence Science and Technology Group (DSTG) acts as the bridge in the partnership between Defence users and Australia’s leading ocean modellers at the Bureau of Meteorology and the Commonwealth Scientific and Industrial Research Organisation (CSIRO). 

DSTG translates Navy’s operational user needs into scientific requirements, ensuring the information is useful and relevant by working with the users. DSTG researchers continually refine the models, tailoring them to real-world decision-making. 

'The way you get that winning edge is by understanding the operational environment and how your sensors and platforms will perform in that environment.'

Before Bluelink, ships could only understand the environment by sampling water directly around them. There was no reliable way to predict changes or conditions beyond the horizon.

The partnership has grown steadily over two decades, and according to Daniel Boettger, DSTG’s Discipline Leader for Ocean Environment and Acoustics, Bluelink is now critical to the ADF’s operational capability.

“The skill and accuracy of the products and services that are available has increased a lot over that time,” Dr Boettger said.

“We’ve all worked together to develop a common understanding of what Defence is trying to achieve.”

He said that advancing sensor and platform technology was not enough, and that true advantage could not come from the equipment alone. It must also exploit knowledge of the waters in which the equipment operates.

“The way you get that winning edge is by understanding the operational environment and how your sensors and platforms will perform in that environment,” Dr Boettger said.

As Defence marks World Meteorological Day on March 23 to commemorate the establishment of the World Meteorological Organization in 1950, Bluelink stands as a reminder of how critical environmental intelligence has become to modern maritime operations.

Behind every sonar contact and every plotted course, science is at work to ensure the ADF always has the best possible understanding of the water beneath it.