Chief Quartermaster Guy Hetterling, assigned to the guided-missile frigate USS Vandegrift, explains to an Indonesian Boy Scout how the pelorus is used to measure the relative bearings of other ships during a tour for Cooperation Afloat Readiness and Training (CARAT) Indonesia 2012. CARAT 2012 is a nine-country, bilateral exercise between the United States and Bangladesh, Brunei, Cambodia, Indonesia, Malaysia, Singapore, the Philippines, Thailand and Timor Leste and is designed to enhance maritime security skills and operational cohesiveness among participating forces.