EASTERN PACIFIC OCEAN (Sept. 23, 2021) Lt. j.g. William Burdge, from Boise, Idaho, discusses surface warfare tactics with Mexican Navy Lt. Cmdr. Carlos Corro-Peréz in the pilothouse of the Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89), Sept. 23, 2021. SIFOREX is a Peruvian naval exercise that focuses on ASW proficiency. It provides a unique opportunity for naval forces to conduct ASW operations against multiple diesel submarines in a complex environment. (U.S. Navy Photo by Mass Communication Specialist 2nd Class James S. Hong)