US Donates $1.3M to Peru for Submarine Training & Exercises | Subdiex 2025 & Unitas 2025

U.S. Provides $1.3 Million to Peru for Submarine Training Exercise

The U.S. Military Advisory and Assistance Group has provided $1.345 million to Peru’s Ministry of Defense to help cover costs associated with training, maintenance, and logistics for the Peruvian Navy’s submarine force during the Subdiex 2025 exercise. The funding underscores the ongoing security cooperation between the two nations, particularly in the realm of anti-submarine and anti-surface warfare capabilities. This financial support facilitated the deployment of the BAP Pisagua (SS-33), a Peruvian submarine, to the U.S. East Coast for joint training exercises with the U.S. Navy.

Subdiex 2025: Enhancing Anti-Submarine Warfare Skills

The core objective of Subdiex 2025, as officials have stated, was to enhance the U.S. Navy’s proficiency in countering quiet, diesel-electric submarines. The BAP Pisagua, a Type 209/1200 submarine, operated out of Naval Station Mayport in Jacksonville, Florida, engaging in naval maneuvers alongside various U.S. Naval units. This training provided a valuable opportunity for the U.S. Navy to hone its skills against a realistic submarine threat, a capability increasingly important in a complex global security environment. The exercise focused on simulating real-world scenarios, allowing both navies to refine their tactics and interoperability.

Unitas 2025: A Broader Multinational Exercise

The deployment of the BAP Pisagua wasn’t limited to Subdiex 2025. It too formed part of the 66th iteration of Unitas 2025, a multinational naval exercise commemorating the 250th anniversary of the U.S. Navy. Unitas, which brought together naval forces from over 20 countries, provided a broader platform for regional cooperation and maritime security. The exercise, held in Norfolk, Virginia, and other locations, included operations focused on anti-submarine warfare, anti-surface warfare, and humanitarian aid. Infodefensa.com reports that the participation of the Peruvian submarine was a key component of this larger multinational effort.

The BAP Pisagua: A Key Asset for Peru

The BAP Pisagua (SS-33) is a significant asset for the Peruvian Navy. As a Type 209/1200 submarine, it represents a modern diesel-electric submarine capable of operating in a variety of maritime environments. Zona Militar detailed the submarine’s return to the Naval Base of Callao in late 2025, following its successful deployment to the United States. The submarine initially departed Callao on August 11, 2025, heading for Mayport, Florida.

Confirmed vs. Unclear Details

Whereas the $1.345 million in U.S. Funding and the participation of the BAP Pisagua in both Subdiex 2025 and Unitas 2025 are confirmed, certain details remain unclear. The specific breakdown of how the $1.345 million was allocated – covering training, maintenance, and logistics – was not provided in the available sources. The exact nature of the training exercises conducted during Subdiex 2025, beyond the general focus on anti-submarine warfare, has not been independently confirmed. The number of Peruvian personnel involved in the exercises, beyond the submarine crew, also remains unspecified. The full scope of the interoperability gains achieved during the exercises is still being assessed.

Background: Peru-U.S. Naval Cooperation

Peru and the United States have a long history of naval cooperation, rooted in shared security interests and a commitment to regional stability. Joint exercises like Subdiex and Unitas are a regular feature of this relationship, designed to enhance interoperability and strengthen the capabilities of both navies. The U.S. Has consistently provided military assistance to Peru, including training, equipment, and financial support. This assistance is often focused on areas such as counter-terrorism, counter-narcotics, and maritime security. The Type 209/1200 submarine class itself represents a significant investment in Peru’s naval capabilities, allowing the country to project power and protect its maritime interests. Infobae reported that this marks the second consecutive year the Pisagua has participated in these U.S.-led maneuvers.

What Happens Next?

Following its return to the Naval Base of Callao, the BAP Pisagua is likely undergoing a period of maintenance and evaluation. The Peruvian Navy will assess the lessons learned during the deployment to the United States and incorporate them into future training programs. Continued cooperation with the U.S. Navy is expected, with potential for further joint exercises in the coming years. The U.S. Is likely to continue providing military assistance to Peru, focusing on areas that align with shared security interests. The success of Subdiex 2025 and Unitas 2025 will likely inform the planning of future exercises, with a continued emphasis on enhancing anti-submarine warfare capabilities and regional maritime security.