The Initial Operational Capability (IOC) was achieved after testing performed by Air Test and Evaluation Squadron One (VX-1) with support from the Maritime Patrol and Reconnaissance Aircraft Program Office (PMA-290).
The U.S. Navy has declared Initial Operational Capability (IOC) for the P-8A Poseidon Increment 3 Block 2 (Inc 3 Blk 2) system.
“The P-8A Inc 3 Blk 2 modifications enhance Naval Aviation’s Maritime Intelligence, Surveillance, Reconnaissance, and Targeting (ISR&T) capabilities – the eyes of the Fleet,” said Rear Adm. Michael Wosje, Director of Air Warfare (OPNAV N98) in a public statement. “This capability enhancement is in line with the CNO Fighting Instructions and the Golden Fleet Initiative, which shifts the paradigm from platform-centric thinking to a warfighting system. We are delivering the P-8A Inc 3 Blk 2 as a high-end, networked, and rapidly adaptable platform.”
As we reported in June 2025, when the first P-8A Increment 3 Block 2, delivered to the U.S. Navy the same month, flew for the first time, the upgrade includes new airframe racks, radome, antennas, sensors, and wiring. The electronics comprise “a new combat systems suite with improved computer processing, higher security architecture, a wide band satellite communication system, an ASW signals intelligence capability, a track management system, and additional communications and acoustics systems to enhance search, detection and targeting capabilities. It brings the full ASW, anti-surface warfare (ASuW), and intelligence, surveillance and reconnaissance (ISR) capabilities outlined in the P-8A program’s evolutionary acquisition strategy.”
The modified P-8A BuNo 169562 is one of the seven airframes chosen for the upgrades in the contract with Boeing. Increment 3 Block 2 related modifications were implemented at Boeing’s Maintenance, Repair and Overhaul hangar at Cecil Airport in Jacksonville, Florida.
The P-8, is the Department of War’s only long-range full-spectrum anti-submarine warfare (ASW), cue-to-kill platform, with substantial armed anti-surface warfare (ASuW) and networked intelligence, surveillance, and reconnaissance (ISR) capabilities.
“The recent deployment of P-8A Increment 3 Block 2 marks the culmination of a spiral development strategy that delivers winning capability to the Fleet and ensures that the P-8A will remain agile, relevant, and lethal for decades to come,” said Rear Adm. Craig Mattingly, Commander Patrol and Reconnaissance Group (CPRG), responsible for the manning, training, and equipping of the Maritime Patrol and Reconnaissance fleet of aircraft for the U.S. Navy.
Among the new capabilities introduced by I3B2, a new secure communications suite and an enhanced sonar system that tracks detonation sounds reflected off submarines and detected by receiver buoys. The upgrade also includes a new track management system meanwhile fuses and prioritizes data on a single, aided by better “computing power” to meet the new demands of the improved mission suite. The aircraft will also receive a signals intelligence (SIGINT) capability, as well as the payloads currently used by the MQ-4C Triton.
As reported by The Aviationist in Aug. 2024, when a new Multi-Mission Pod (MMP) developed by Boeing was spotted on a Navy P-8A Poseidon, I3B2 allows the “aircrews to search, locate and track the most advanced submarines in the world, enabling the fleet to pace the threat with the required capability and capacity to win the fight.”
For surface strike missions, the P-8A Poseidon can already carry four AGM-84 Harpoons under its four underwing hardpoints, and is also being tested to be integrated with the AGM-184C LRASM (Long-Range Anti-Ship Missile) by Boeing and the U.S. Navy, with the company saying the work was scheduled to be concluded by the summer of 2024.
PMA-290 has advanced P-8A’s capabilities through a phased, incremental acquisition strategy using Engineering Change Proposals (ECPs). This approach began with Increment 1, which reconstituted the capabilities of the legacy P-3C Orion, and continued with further upgrades in Increment 2.
“I am extremely proud of the dedicated and focused acquisition team that is delivering this capability to the fleet,” said Capt. Erik Thomas, PMA-290 program manager. “The P-8A Increment 3 Block 2 modifications could not have come at a better time in our current state of evolving threats. The Poseidon is the cornerstone of sophisticated and lethal global maritime patrol and reconnaissance forces, and this enhanced capability ensures we sustain the core pillar of world-class maritime intelligence, surveillance, reconnaissance and targeting (ISR&T) and remain ready for our current and future fights.”
The Navy has not publicly stated that Increment 3 Block 2 modifies the AN/APS-154 Advanced Airborne Sensor (AAS). However, the upgrade’s new combat systems suite, improved processing, track management, higher security architecture and wideband communications are likely to improve how AAS-derived data can be processed, fused with other onboard sensors, displayed to the crew and shared across the wider kill chain.
The AAS is a Raytheon-developed, podded AESA radar carried in a distinctive canoe-shaped fairing under the P-8A’s fuselage. A successor to the AN/APS-149 Littoral Surveillance Radar System previously used on modified P-3C Orions, the AAS significantly expands the Poseidon’s ISR role beyond traditional maritime patrol missions, providing advanced surveillance functions believed to include SAR imaging, moving target indication over land and at sea, and other classified intelligence-gathering capabilities. By feeding this data into the P-8A’s mission systems, the sensor supports wide-area maritime and littoral surveillance, land-target tracking, anti-surface warfare and networked targeting across joint and allied forces.
