Diver detection sonar technology developed by Sonardyne International Ltd, UK, has played a part in a international exercise organized to train naval forces in mine countermeasures, maritime security operations and harbor protection operations. The International Mine Counter-Measures Exercise (IMCMEX) runs off the coast of Bahrain every 18 months to test the abilities of the navies of the world to keep sea lanes open and safe. A total of 6,500 personnel and 38 warships from 44 navies took part in the event, the third and largest so far.