Driven by the long held desire to remove human operators from the danger zone, technological advancements are leading to rapid enhancements in over-the-horizon military capability of unmanned, autonomous platforms. These vehicles offer potential solutions to a wide range of maritime defence needs, such as intelligence, surveillance and reconnaissance (ISR), mine countermeasures (MCM) and even weapons delivery. The emergence of this technology not only provides military capability but also offers significant cost savings over traditional methods of fulfilling mundane, dirty or dangerous tasks.