The U.S. has approved a possible Foreign Military Sale to Denmark of up to three P-8A Poseidon multi-mission maritime patrol and reconnaissance aircraft, worth $1.8 billion.
The U.S. Government has approved a possible Foreign Military Sale (FMS) of the P-8 Poseidon to Denmark on Dec. 29, 2025. Should the deal go through, the Danish aircraft would join Germany, Norway and the UK as the multi-mission maritime patrol and reconnaissance aircraft continues to expand its footprint in Europe.
The FMS
According to the Defense Security Cooperation Agency’s (DSCA) notice, Denmark would get up to three P-8s. These will likely replace the Challenger 604s that the Royal Danish Air Force currently operates in the maritime patrol role.
Together with the three P-8s, Denmark would also get Multifunctional Distribution System Joint Tactical Radio Systems, Guardian Laser Transmitter Assemblies for the AN/AAQ-24(V)N, electro-optical and infrared MX-20HD systems, NexGEN Missile Warning Sensors for the AN/AAQ-24(V)N, AN/AAQ-2(V) acoustic systems, AN/APY-10 radar systems and ALQ-213 early warning management systems, among all items.
The deal would be accompanied by the standard U.S. Government and contractor engineering, technical, and logistics support services, and other related elements of logistics and program support. The total estimated cost for the FMS is $1.8 billion.
The notice did not include a timeline for the expected delivery of the aircraft. Using as reference previous FMS of the P-8 to European customers, the first aircraft might be delivered in the 2029-2030 timeframe.
Denmark and the P-8
The Danish Defense Minister Troels Lund Poulsen said in September 2025 that the country was looking to acquire the P-8, investing millions of Euro, to patrol coastal Greenland waters. A cooperation and sharing agreement was also being evaluated at the time.
“I would prefer that we cooperate with other NATO countries to get the most for the money and to have a greater degree of flexibility,” said the Minister. “But if that is not possible, I am also willing for us to acquire the P-8 aircraft capacity ourselves. We need to have a better picture of what is happening around Greenland and the Faroe Islands.”
Poulsen’s comments might be a reference to the friction with the U.S. over U.S. President Donald Trump’s ambitions of annexing Greenland, the Danish semi-autonomous overseas territory. Trump repeatedly claimed throughout 2025 that the United States “need Greenland for national security purposes.”
Denmark, on the other hand, announced plans to enhance its military presence there. For instance, F-16s fighter jets and EH-101 helicopters were delivered to Greenland in June 2025.
P-8 Poseidon
The P-8A Poseidon is a long-range, multi-mission maritime patrol aircraft developed by Boeing for the U.S. Navy to replace the aging P-3C Orion. Based on the 737-800ERX airframe, the aircraft incorporates numerous structural and systems modifications to meet the demanding requirements of anti-submarine warfare (ASW), anti-surface warfare (ASuW), intelligence, surveillance and reconnaissance (ISR), and search and rescue (SAR) operations.
Internally, the Poseidon is equipped with an advanced mission suite that integrates multi-mode radar, an electro-optical/infrared (EO/IR) turret, and a comprehensive acoustic system capable of processing data from over 100 sonobuoys. The aircraft is also capable of deploying Mk 54 lightweight torpedoes, depth charges, and AGM-84 Harpoon anti-ship missiles from both its internal bomb bay and underwing hardpoints.
The P-8A is currently undergoing a significant capability enhancement with the Increment 3 Block 2 (I3B2) upgrade. First flown in June 2025, the Block 2 configuration introduces improved multi-static acoustic processing, new mission systems, an upgraded EW suite, and the integration of advanced weapons such as the AGM-158C Long Range Anti-Ship Missile (LRASM). The update also includes provisions for additional ISR and electronic support payloads, increasing mission flexibility.
Among the key enhancements is the High Altitude Anti-Submarine Warfare Capability (HAAWC), which enables the Poseidon to release torpedoes from high altitude using a winged glide kit. This development significantly increases survivability by allowing the aircraft to remain outside the threat envelope of submarine-launched or ship-based air defenses.
To improve survivability in contested environments, the U.S. Navy has also contracted BAE Systems to develop the Advanced Survivability Pod (ASP). The pod integrates radio-frequency and infrared threat detection, countermeasures, and a fiber-optic towed decoy system, providing protection against radar-guided and heat-seeking missiles.
In service with the U.S. Navy since 2013, the P-8A Poseidon is now also operated by several allied nations including Australia, the United Kingdom, Norway, India, Germany and, in future, by Canada. As maritime competition intensifies globally, the P-8A’s multi-mission capabilities, ongoing upgrades, and interoperability make it a cornerstone of modern naval operations.
