A Sri Lankan military boat takes part in a joint Indo-Lanka naval exercise at Trincomalee navy base in Trincomalee, about 275km (171 miles) east of Colombo, September 23, 2011. The Joint Indo-Lanka Naval exercise, codenamed SLINEX II is being held at Trincomalee navy base from 19 to 23 September with over a dozen ships, helicopters and one maritime reconnaissance aircraft taking part. REUTERS/Dinuka Liyanawatte (SRI LANKA - Tags: POLITICS MILITARY)