KUALA LUMPUR: Malaysia will send more equipment to the southern Indian Ocean to join the search for Flight MH370 which went missing four months ago, a minister said on Sunday. Defense Minister Hishammuddin Hussein said a Malaysian navy ship equipped with a multi-beam echo sounder — a device to map the ocean floor — would set sail on August 4 for the deep-sea search zone far off western Australia. State energy firm Petronas, together with Deftech and Phoenix International, would deploy a towed device called a synthetic aperture sonar to scan the ocean floor, he said. Shipbuilder Boustead Heavy Industries, together with iXBlue Australia, would send a deep towed side scan sonar with a remotely operated vehicle. “Instructions for immediate mobilization have been given and the assets are expected to reach the search area in mid-August 2014,” Hishammuddin said. He did not give a cost estimate. Another Malaysian vessel which was deployed in April will stay in the search area, he added.