Seven warships have sailed from Navy bases on both sides of the country to undertake a range of training activities.
Families warmly welcomed home the crew off HMAS Ballarat after nearly nine months at sea.
Ballarat has stopped illegal narcotics in excess of AUD$1 billion from funding terrorism and other illegal activity.
HMAS Ballarat intercepted another 2.6 tonnes of illicit drugs while patrolling international waters in the Arabian Sea.
Boardings at sea are key to Australian warships achieving counter-piracy, counter-terrorism and counter-narcotics missions.