The Royal Malaysian Air Force (RMAF) is expected to receive its fourth Airbus A400M aircraft early next year.

Its chief, Gen Tan Sri Roslan Saad said the military transport aircraft was the last of four bought by the RMAF.

The first aircraft was delivered in March 2015, the second came early this year while the third was received in the middle of this year.

Roslan said the aircraft have sophisticated technology and will enhance the nation's air defence systems.

"The fourth aircraft will be equipped with new software," he told reporters after pinning ranks on 17 senior RMAF officers at the Ministry of Defence Tuesday.

The A400M aircraft can cover a longer distance and carry more cargo. It can also do medical evacuation, air-to-air refueling, aerial delivery and disaster relief and humanitarian aid. -- Bernama