This afternoon HMAS Waller, one of the Royal Australian Navy's submarines, experienced a fire whilst on the surface off the West Australian coast.
Emergency response actions were taken to extinguish the fire.
There were no causalities.
As a precaution four members of the ships crew who were involved in the response to the fire have been landed for observation.
HMAS Waller had recently completed a scheduled maintenance period and was at sea as part of her return to operations.
A full investigation into the incident will be held.
At this stage no further details are available.