A 3rd Battalion, 2nd Division Indonesian Marine watches his water survival instructor closely during Shallow Water Egress Training at Marine Corps Base Hawaii (MCBH), Kaneohe Bay, Hawaii, July 2, in support of the Rim of the Pacific Exercise in Hawaii, which runs through to Aug. 1 and is comprised of 14 nations, 32 ships, five submarines, more than 170 aircraft and 20,000 personnel. RIMPAC in it's 22nd year is a biennial exercise that stresses interoperability of all partner nations as a key element of regional stability.