The scuttling of the former HMAS Adelaide to form an artificial reef will generate millions of dollars of revenue, the NSW government says.
The ex-navy frigate was sunk off Avoca beach on the NSW central coast late on Wednesday morning, after a year of delays arising from legal action by protesters.
The Minister for the Central Coast, Chris Hartcher, says the wreck will generate millions of dollars in tourism and follow-on revenue for the coast's economy.
It would be a unique dive site, the first of its kind in NSW, and a world class recreational facility, Mr Hartcher said in a statement.
Divers from all over Australia and the world would be visiting the central coast, many for the first time.
"This will deliver significant recreational, tourism and economic benefits to the region, as well as educational and scientific research opportunities," he said.
It would provide a "a great opportunity" to market the coast's many other attractions.