Rimpac Exercise 2025 Lok. Approximately 29 nations, 40 surface ships, three submarines, 14 national land forces, over 150 aircraft and more than 25,000 personnel will participate in the. Rimpac 2025 is the 29th exercise in the series that began in 1971.

Rimpac’s 29th iteration, from late june into early august 2025, features 29 nations, 38 surface ships, three submarines, 14 national land forces, about 170 aircraft. Rim of the pacific (rimpac) is a biennial exercise designed to foster and sustain cooperative relationships, critical to ensuring the safety of sea lanes and security.