Undersea Defence Technology Australia 2026

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Industry trends

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Frequently asked

Glossary

1

AUV

Autonomous underwater vehicle; an uncrewed submarine that carries its own power and control systems to survey, detect or inspect without a tether.

2

UUV

Uncrewed underwater vehicle; a broad term covering AUVs and remotely operated underwater vehicles used for military and civil underwater missions.

3

ROV

Remotely operated vehicle; a tethered underwater robot controlled from a surface ship or platform, often used for inspection, intervention and recovery.

4

ASW

Anti-submarine warfare; the sensors, weapons, platforms and tactics used to detect, track and counter submarines.

5

Sonar

Sound navigation and ranging; the use of underwater acoustics to detect, locate and classify objects or to map the seabed.

6

Passive sonar

A sonar mode that listens for radiated noise from a target without transmitting, helping to avoid detection.

7

Active sonar

A sonar mode that transmits an acoustic pulse and analyses the returning echo to detect and localise objects.

8

Towed array

A long acoustic sensor array towed behind a ship or submarine to detect and track underwater targets at range.

9

Acoustic modem

An underwater communications device that sends data through water using sound waves rather than radio.

10

MCM

Mine countermeasures; the systems, sensors and procedures used to detect, classify, neutralise or avoid sea mines.

11

CMS

Combat management system; the software and hardware that fuses sensor data, supports tactical decisions and controls weapons and sensors.

12

Payload

A mission-specific package carried by an underwater vehicle or platform, such as a sensor, camera, sonar or effector.

13

Autonomy

The ability of an underwater system to plan, navigate and execute parts of a mission with limited human intervention.

14

Hydrography

The measurement and mapping of water depth, seabed shape and features for navigation, engineering and environmental purposes.

15

Bathymetry

The underwater equivalent of topography; the measurement of seabed depth and relief.

16

Pressure hull

The strong inner hull of a submarine that withstands external water pressure and protects the crew and equipment.

17

Propulsor

A propeller, pump-jet or other device that generates thrust for a submarine or underwater vehicle.

18

Sea acceptance trials

Tests conducted at sea to verify that a vessel, sensor or system meets contractual and operational requirements before acceptance.

19

Digital twin

A digital model of a physical platform or system used for design, simulation, maintenance planning and training.

20

Open architecture

A system design that uses published interfaces and standards so sensors, software and payloads from different suppliers can integrate.

21

Littoral

The coastal zone between land and open ocean, where shallow water, traffic and seabed conditions complicate undersea operations.

22

AUKUS

A trilateral security partnership between Australia, the United Kingdom and the United States that includes submarine and advanced-technology collaboration.