BAE Systems said two Royal Australian Navy ANZAC-class frigates being modernized by its sustainment teams are being upgraded on opposite sides of the continent.

HMAS Perth and HMAS Anzac are each receiving more than 15 engineering changes in the modernization program. Included will be enclosing the ships' quarter deck and modifications for the use of MH-60 Romeo helicopters.

Remediation of their radar cross section will occur and one ship will be equipped with an Electronic Surveillance Mast and supporting communications gear.

Work by BAE Systems on HMS Perth is being conducted in Henderson, Western Australia, while HMAS Anzac is being worked on in Sydney.

The upgrade to HMS Perth is scheduled for completion in December, while HMAS will be completed this month.

"The work being undertaken by our teams in the east and west is testament to the skills, capabilities and cross-country footprint available in our Maritime business and demonstrates the essential role we play in supporting the Australian Defense Force," BAE Systems Australia said.