UNCREWED. UNLIMITED POTENTIAL.

Proven Automonous Capability At Sea

With proven autonomous solutions already in the water, Leidos is setting the pace when it comes to the most challenging aspects of uncrewed system requirements at sea. Leidos’ global Sea Systems portfolio includes operationally proven medium USVs - Sea Hunter, Sea Hawk, Ranger, Mariner as well as undersea systems including Sea Castle, Sea Specter, Sea Dagger and Sea Dart. Now, Leidos Australia has delivered Sea Archer – an Australian-built USV designed for endurance, speed and mission adaptability.

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Built in Australia
Mission Ready in 2026

Sea Archer is an Australia-built uncrewed surface vessel (USV). Designed for Australia’s vast waters, Sea Archer brings powerful autonomy, speed, endurance and adaptability to every mission.

With rapid production potential across multiple boatyards and local capability across the supply-chain, Sea Archer supports a strong sovereign ecosystem, through to sustainment.

The first aluminium vessel has been built by NSW Central Coast based Oceans Rivers Lakes and will be mission ready in 2026.

Find out more

Proven Maritime Capabilities for the Australia-Pacific Region

With a 50-year heritage with the US Navy and a record 120,000 operational autonomous nautical miles at sea, Leidos has the only proven oceangoing autonomous system that can operate in fleet. We’re fast-tracking these proven capabilities to Australia to enable the fleet of the future.

Leidos’ autonomous vessels are driven by proprietary core autonomy system LAVA (Leidos Autonomous Vessel Architecture). It enables:

Full autonomy: supports navigation, obstacle avoidance, and mission execution without human intervention.
Modular integration: can be deployed across multiple vessel types and sizes.
Mission flexibility: enables ISR, logistics, electronic warfare, and more.
Blue water performance: used in record-setting endurance missions across the Pacific.

Sea Archer

With Leidos’ Autonomous Vehicle Architecture, 40 knot speed, and 1500 nautical mile range, Sea Archer can carry more than 900 kg of enclosed payload and can support strike, logistic resupply, ISR and EM deception operations. It can also operate in swarms.

See it in action below.

Sea Dart

Sea Dart is a compact, modular, and low-cost uncrewed undersea vessel (UUV) designed for versatile mission profiles including mine countermeasures, infrastructure monitoring, and oceanographic research. Its open architecture allows compatibility with a range of systems, and its lightweight design—available in 15cm and 22cm diameters —enables deployment by just one or two people.

Watch the video below to find out more or check out our fact sheet.

Sea Castle

The ultimate force multiplier for unmanned underwater vehicles (UUVs), Sea Castle™ provides in-water recharging, data transfer, and mission updates to extend operations without breaking the surface. Sea Castle is compatible with multiple vehicle types and is supported by Mahi and OptiNAV software.

See it in action below.

Sea Dagger

Sea Dagger is a next-generation Commando Insertion Craft (CIC) concept developed for the Royal Navy. The first craft of its size to combine speed, range, vehicle delivery and modular mission systems into a single platform, Sea Dagger sets a new standard in maritime autonomy and operational agility.

Watch it in action below.

Sea Specter

Inspired by narco-sub technology, the stealthy, long-range maritime platform navigates undetected while delivering critical supplies and firepower deep into contested waters.

Find out more about its capabilities below.

Medium USVs

Leidos' operationally proven medium uncrewed surface vessel (USV) include Sea Hunter, Sea Hawk, Ranger and Mariner. These USVs are designed for long-duration maritime surveillance and reconnaissance missions.

See the vessels in Sydney Harbour.

Acoustic Device Countermeasure Mark 5 (ADC MK5)

ADC MK5 is the U.S. Navy’s next-generation torpedo countermeasure. This autonomous, 3-inch expendable device launches from a submarine’s internal system. ADC MK5 enhances submarine defense and can be adapted for other applications, ensuring the Navy stays ahead of evolving undersea threats.