It's small, bright blue and named after an unwelcome visitor to our beaches but the experts say the Bluebottle will take the dull, dirty and dangerous work out of defending Australia.
The high-tech unmanned aquatic drone - dubbed Bob in honour of the late Australian larrikin prime minister Bob Hawke - can remain at sea for months monitoring anything from submarines and surface vessels to whales.
The NSW government paraded Bob the Bluebottle at Rose Bay on Thursday as an example of the latest available defence technologies, which will be on show at the Pacific 2019 international maritime expo in Sydney this October.
The vessel was developed by Sydney's Ocius Technology and is set up for "anti-submarine" warfare, the company's chairman Mark Bethwaite said.
"If you had a valuable asset, be it Sydney Harbour, Port Philip, oil rigs, Bass Straight, you could put a semi-circle or a full circle of these around it and detect any threats which may be approaching," he told reporters on Thursday.
"You could have a virtual fence of these between Australia and its neighbours to the north so that any vessel trying to enter Australia will trigger an alarm which could be set off by these and then you send out a man vessel to deal with the threat."
Bob allows for a decrease in the amount of manpower required to defend Australia's borders with one person capable of controlling up to 100 vessels from anywhere in the world, Mr Bethwaite added.
"It's a force multiplier ... What drones do very well is to take out the dull, the dirty and the dangerous work that has been done by humans," he said.
Bob and the defence technologies of 15 other NSW companies will be on show at the October marine expo.
Australian Associated Press
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