US Navy evaluates MQ-9B SeaGuardian to expand 7th Fleet's P-8A anti-submarine warfare aircraft missions.

The U.S. Navy evaluated the General Atomics MQ-9B SeaGuardian uncrewed aircraft system at Naval Air Station Whidbey Island in Washington to support ongoing 7th Fleet maritime patrol and reconnaissance assessments. The evaluation integrated the uncrewed platform alongside P-8A Poseidon aircraft during senior leadership reviews focused on modernizing fleet anti-submarine warfare and persistent surveillance tactics. This operational assessment examines how long-endurance unmanned systems can distribute workloads and enhance surveillance capacity within established maritime patrol forces.

The company-owned, company-operated MQ-9B SeaGuardian demonstrated a 1,200-nautical-mile anti-submarine warfare mission radius, over 30 hours of endurance, and multi-sensor payload integration including sonobuoy management systems. While the Navy has not yet announced a formal procurement program or acquisition quantity, the evaluation quantifies potential cost-efficiency and persistence multipliers compared to crewed alternatives.

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The U.S. Navy is examining whether the MQ-9B SeaGuardian could serve as a force multiplier for persistent surveillance, targeting, communications, and submarine-search capabilities within a maritime patrol force centered on crewed P-8As and other specialized aircraft. (Picture source: GA-ASI)

On September 30, 2026, General Atomics Aeronautical Systems (GA-ASI) announced that the U.S. Navy is evaluating the MQ-9B SeaGuardian at the Maritime Patrol and Reconnaissance Force (MRPF) Commander’s Operational Group at Naval Air Station Whidbey Island, Washington, as it continues assessing the long-range maritime surveillance uncrewed aircraft for 7th Fleet missions. The evaluation placed the maritime MQ-9B alongside the P-8A Poseidon during a gathering of MPRF senior leaders and tacticians reviewing anti-submarine warfare tactics, techniques, and procedures used across the fleet. The SeaGuardian is already being operated for the Navy under a company-owned, company-operated contract with General Atomics supporting the 7th Fleet capability assessment, but the service has not announced an MQ-9B procurement program, operational squadron, or acquisition quantity. 

At the request of Commander, Patrol and Reconnaissance Group, General Atomics brought SeaGuardian to Whidbey Island as a maritime-optimized Group 5 remotely piloted aircraft already being used in Navy activities under the COCO arrangement. The same location has supported MQ-9B participation in Northern Edge and Integrated Battle Problem activities, while SeaGuardian has also supported aircraft carrier pre-deployment workups and appeared at the 2025 Whidbey Island Open House. The aircraft has a 79-foot (24 m) wingspan, measures 38 feet (11.7 m) in length and has a maximum gross takeoff weight of 13,500 lb (6,124 kg), including up to 6,000 lb (2,721 kg) of fuel. Its Honeywell TPE331-10 turboprop supports speeds of approximately 210 KTAS, while range can exceed 5,000 nautical miles depending on configuration. Payload capacity reaches 800 lb (363 kg) internally and 4,750 lb (2,155 kg) externally across eight wing hardpoints and one centerline station.

The Navy has already exercised a broad MQ-9B maritime sensor and communications configuration rather than limiting the aircraft to electro-optical surveillance. During Northern Edge 2023 in the Gulf of Alaska from May 8 to 19, SeaGuardian carried Sierra Nevada Corporation Electronic Support Measures, L3Harris communications intelligence equipment, Raytheon SeaVue multimode radar, radar Moving Target Indication and Inverse Synthetic-Aperture Radar functions, Automatic Identification System reception, high-definition EO/IR and Link 16. Link 16 connectivity used an L3Harris Small Tactical Terminal KOR-24A, while Ultra Electronics Air Defense Systems Integrator software operated on a Parry Labs Stellar Relay Common Compute Module. Radar, SIGINT and full-motion video were processed through the Minotaur Mission System and supplied to Pacific Fleet, Pacific Air Forces, the Joint Exercise Control Group at Joint Base Elmendorf-Richardson and other command locations. SeaGuardian also transmitted classified information into the Joint Fires Network and passed ISR and targeting information to participating surface and airborne forces.

Northern Edge additionally tested how the MQ-9B could be moved and controlled across the distances relevant to Pacific operations. SeaGuardian self-deployed more than 2,000 nautical miles in a single flight from General Atomics’ Desert Horizon facility at El Mirage, California, to Joint Base Elmendorf-Richardson, Alaska, before returning after the exercise. Its Mission Command Element, including the Certified Ground Control Station and Mission Intelligence Station, remained at NAS Whidbey Island, separating the aircraft’s forward operating location from part of its command and intelligence infrastructure. The aircraft also operated with the General Atomics Detect and Avoid system under a limited Naval Air Systems Command certification permitting beyond-visual-line-of-sight operations in the exercise airspace. The combination demonstrated three elements relevant to distributed maritime operations: long-distance self-deployment, satellite-supported remote mission control and operation without requiring the full control organization to deploy to the aircraft’s forward location.

The anti-submarine warfare configuration is particularly relevant to the Whidbey Island assessment because SeaGuardian can participate in the acoustic search process rather than serving only as a surface-surveillance aircraft. Four wing stations can carry four sonobuoy dispenser pods with a combined capacity of up to 40 A-size or 80 G-size sonobuoys, supported by a sonobuoy management and control system; in a maritime ISR and ASW configuration, the aircraft has an approximately 1,200-nautical-mile mission radius while retaining substantial time on station. During Integrated Battle Problem 2023 on April 24-25, a company-owned SeaGuardian operating under Navy flight clearance worked with MH-60R Seahawks from Helicopter Maritime Strike Squadrons 38, 49, 71 and 75 in the Southern California Offshore ASW range. The MH-60Rs deployed sonobuoys against a mobile training target, the combined force correlated and located the contact, and the MQ-9B crew transmitted tactical reports to Commander, Task Force 34 Theater ASW Center at Pearl Harbor. CTF 34 subsequently directed a constructive attack using notional MH-60R torpedoes, while the MQ-9B ASW equipment incorporated the General Dynamics Mission Systems Sonobuoy Processor.

The operational case being examined is therefore based on persistence and workload distribution rather than replacing the P-8A with MQ-9B on a one-for-one basis. SeaGuardian combines more than 30 hours of endurance with a stated range exceeding 5,000 nautical miles depending on configuration, a 1,200-nautical-mile ASW mission radius, up to 5,550 lb of combined internal and external payload capacity and carriage of as many as 80 G-size sonobuoys. Its flight-hour cost is placed at approximately $5,000 compared with more than $35,000 for crewed alternatives, which would correspond to about $150,000 for 30 flight hours at the MQ-9B figure versus more than $1.05 million at the cited crewed-aircraft rate.

The September 2026 Whidbey Island activity consequently places SeaGuardian evaluation inside the Navy community responsible for maritime patrol and anti-submarine warfare rather than treating the MQ-9B as an isolated unmanned aircraft experiment. Previous Navy activities have already tested a self-deployment exceeding 2,000 nautical miles, geographically separated mission control, multi-sensor maritime collection, Link 16 connectivity, Joint Fires Network information transfer and cooperative submarine prosecution involving four MH-60R squadrons and a theater ASW command center. The unresolved questions are organizational and operational: how many MQ-9Bs the Navy would require, whether they would remain company-owned and contractor-operated or transition to an organic Navy structure, where they would operate, and how their surveillance and ASW workload would be divided with P-8A, MH-60R and other MPRF aircraft.

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Written by Jérôme Brahy

Jérôme Brahy is a defense analyst and documentalist at Army Recognition. He specializes in naval modernization, aviation, drones, armored vehicles, and artillery, with a focus on strategic developments in the United States, China, Ukraine, Russia, South Korea, Türkiye, and Belgium. His analyses go beyond the facts, providing context, identifying key actors, and explaining why defense news matters on a global scale.