A large-scale search is underway off the Queensland coast after a cruise ship passenger was reported missing early on Saturday.

Authorities were alerted after a man, believed to be in his 70s, went overboard during the night while the vessel was travelling off Brisbane.

The incident was reported to crew around 2am, prompting an immediate response onboard and notification to emergency services.

Search crews have since been deployed to waters north-east of Moreton Island.

Carnival Splendor Cruise ship is seen docked in Circular Quay in Sydney. Picture: NCA Newswire / Gaye Gerard
Carnival Cruise Line confirmed the man had been travelling with family, who raised the alarm when he could not be located.

A review of onboard CCTV footage was later conducted.

In a statement, the company said the man “apparently climbed over the safety railing and jumped overboard”.

“The male guest was travelling with family, who alerted the ship’s crew of a possible missing person, and a review of the CCTV footage confirmed the guest’s action,” the spokesperson said.

Authorities were contacted shortly after the incident was confirmed.

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A large-scale search is underway off the Queensland coast after a cruise ship passenger was reported missing early on Saturday. Picture: Chris Kidd/NCA
The Australian Maritime Safety Authority has taken control of the search operation.

A spokesperson said the alert was received with the location identified about 30 kilometres north-east of Moreton Island.

Multiple resources have been sent to the area, including aircraft and vessels.

Search efforts include Challenger jets based in Cairns and Melbourne, along with several rescue helicopters and surface vessels.

Queensland Police are also assisting in the operation.

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Carnival said it would continue to support investigators as the situation develops.

“All appropriate authorities have been alerted and Carnival will assist authorities in their investigation upon the ship’s return to Sydney on Sunday,” the Carnival spokesperson said

“Carnival’s Care Team is supporting the guest’s family and our thoughts and prayers are with them and their loved one.”

The search remains ongoing.