The Australian Navy is confident its troubled amphibious warships will be back in service by October.
HMAS Adelaide and HMAS Canberra have been docked in Sydney on and off since March because of a problem with their propulsion pods.
Chief of Navy Tim Barrett told a Senate estimates hearing HMAS Canberra will participate in the Talisman Sabre military exercise with the US and other nations next month.
HMAS Adelaide will be brought out of dry dock at the end of June for sea trial, he said on Monday.
Vice Admiral Barrett said the pod issue wasn't necessarily a design flaw in the landing helicopter dock vessels.
It was a problem with the "migration of oils" either side of a seal.
The ships, which cost about $1 billion each, were out of action during Cyclone Debbie recovery efforts in March. The landing ship HMAS Choules was sent to north Queensland instead.
