In NSW, the seabreacher is classed as an unsafe vessel. It cannot be registered for general use. Approval may be considered for demonstrations.

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What is a seabreacher?

This information is current as of June 2021.

A Seabreacher is a high-powered submersible craft that is capable of becoming airborne and doing aerial rolls. It can carry 2 people, is approximately 4.9m in length and powered by a rotax engine with jet drive.

Seabreachers are available in various models, each capable of a maximum surface speed of around 100km/h, a maximum submerged speed of around 40km/h and a depth of almost two metres.

Risks when using a Seabreacher

The following risks have resulted in Seabreachers being determined to be unsafe for use on NSW navigable waters:

  • While the craft has a CCTV fitted to the top fin/sail, wash generated at speed, oscillation and vibration of the vessel may restrict the ability of operators to keep a proper lookout.
  • Operators have limited ability to determine whether underwater obstructions exist prior to undertaking any diving.
  • Collision damage can reduce a Seabreacher’s ability to float which may result in the vessel sinking.


The Seabreacher is not suitable for registration and use in NSW. It is considered to be an unsafe vessel under Section 44 of the Marine Safety Act 1998.

Use of a Seabreacher may be approved under an acquatic event licence but only for demonstration purposes and under strict conditions.

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