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Australia, Philippines, U.S. conduct Multilateral Maritime Cooperative Activity

16 February 2026

From U.S. Indo-Pacific Command Public Affairs

SOUTH CHINA SEA — The combined armed forces of Australia, the Philippines, and the United States, demonstrated a collective commitment to strengthen regional and international cooperation in support of a free and open Indo-Pacific while conducting a multilateral Maritime Cooperative Activity (MCA) within the Philippines’ Exclusive Economic Zone, Feb. 15-16, 2026.
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From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026.
From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026.
Australia, Philippines, and U.S. Conduct a Multilateral Maritime Cooperative Activity
From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
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Photo By: Mass Communication Specialist 2nd Class Oscar Diaz
VIRIN: 260216-N-JJ672-2031

As the first multilateral MCA of 2026, this event built on previous MCAs and our continuous operations together, which strengthen the interoperability of our armed and defense forces and their doctrines, tactics, techniques, and procedures. This MCA focused on conducting visual information drills and replenishment-at-sea. 

MCAs are conducted in a manner consistent with international law and with due regard to the safety, navigational rights, and freedoms of all nations. 

Participating units included Royal Australian Navy Anzac-class frigate HMAS Towoomba (FFH 156), Royal Australian Air Force P-8A Poseidon maritime patrol and reconnaissance aircraft, Philippine Navy Jose Miguel Malvar-class guided missile frigate BRP Diego Silang (FFG07), AW109 helicopter, Philippine Air Force’s FA-50 fighter jets, A-29 Super Tucano, C-208B, a Sokol Search and Rescue helicopter, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105), and a P-8A Poseidon assigned to Patrol Squadron (VP) 4. 

From left, Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026.
From left, Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
From left, Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026.
Australia, Philippines, and U.S. Conduct a Multilateral Maritime Cooperative Activity 1 of 3
From left, Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
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From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026.
Australia, Philippines, and U.S. Conduct a Multilateral Maritime Cooperative Activity 2 of 3
From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
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From left, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
Australia, Philippines, and U.S. Conduct a Multilateral Maritime Cooperative Activity 3 of 3
From left, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
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From left, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
From left, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
From left, Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026.
Australia, Philippines, and U.S. Conduct a Multilateral Maritime Cooperative Activity 1 of 3
From left, Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
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From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026.
Australia, Philippines, and U.S. Conduct a Multilateral Maritime Cooperative Activity 2 of 3
From front, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
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From left, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
Australia, Philippines, and U.S. Conduct a Multilateral Maritime Cooperative Activity 3 of 3
From left, Philippine Coast Guard Teresa Magbanua-class patrol vessel BRP Teresa Magbanua (MRRV 9701), Royal Australian Navy Anzac-class frigate HMAS Toowoomba (FFH 156), U.S. Navy Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105) and Philippine Navy Jose Miguel Malvar-class guided-missile frigate BRP Diego Silang (FFG 07) sail in formation during the Maritime Cooperative Activity (MCA) in the Philippines' Exclusive Economic Zone, Feb. 16, 2026. The U.S. Navy routinely operates with the Armed Forces of the Philippines and partners and allies through MCAs to continually develop, exercise and enhance multi-domain tactical interoperability to uphold peace and security in the region. Dewey is forward-deployed and assigned to Destroyer Squadron (DESRON) 15, the Navy’s largest DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Oscar Diaz)
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The U.S., along with our allies and partners, upholds the right to freedom of navigation and overflight and other lawful uses of the sea and international airspace, and respect for all nations’ maritime rights under international law. 

U.S. 7th Fleet, the Navy's largest forward-deployed numbered fleet, routinely interacts and operates with allies and partners in supporting peace, stability, and prosperity and preserving a free and open Indo-Pacific region. 

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