"This is a commodity requirement for commercial-off-the-shelf (COTS) or modified-COTS high-altitude balloon systems and associated equipment," the U.S. Army's 921st Contracting Support Battalion wrote in a recent contracting notice seeking balloons, sensors, and datalinks for delivery within the INDOPACOM area of responsibility (specifically Hawaii).
921st Contracting Support Battalion: market research, not yet a contract
The notice, posted online earlier this week, frames the solicitation as market research and says a "full and open competition" could follow but is not guaranteed. The 921st, headquartered in Hawaii and described as the Army’s main contracting arm in the Pacific with elements spread across the region, listed a specific set of hardware it is exploring. That list calls for 15 high-altitude balloons — five each of 12-, 16-, and 24-gore designs — with the 24-gore type noted for a desired "burst altitude (90k–120k ft class)." The notice did not otherwise lay out detailed performance or payload thresholds beyond those basic dimensions.
Requested sensors, payload buses, and datalinks
The contracting notice specifies multiple sensor packages and connectivity options. It asks for five EO/IR packages with resolution options listed as "1080p/4K/MWIR/LWIR," gimbal stabilization, telemetry bandwidth through "Starlink/LTE/MPU5," and requirements for power draw, onboard processing, and environmental hardening. It seeks five Long Wave Infrared payloads with "Spectral band (8–14 μm); NETD sensitivity (≤50 mK ideal); optics (germanium lenses, FOV options); thermal stabilization; data interface (Ethernet/SDI/USB-C)." Seven "Electronic Sensing" payloads are requested for "(RF/EM/atmospheric/SIGINT)" with frequency coverage, antenna configuration options, data logging choices, and EMI shielding for high-altitude operations.
On the communications side, the Army asked for eight payload buses with Starlink connectivity and MPU5 radios, plus seven additional payload buses with Starlink only. The notice separately calls for helium and other ancillary items to complete the packages. The document’s explicit mention of Starlink (and an industry-focused cousin, Starshield) reflects the growing prevalence of SpaceX’s satellite links in U.S. military experiments and procurement.
Training, experiments, and prior demonstrations
The contracting notice arrives against a backdrop of expanding Army experimentation and training with high-altitude balloons. In March the Army established a new schoolhouse for high-altitude balloon training — the Army High-Altitude Basics Course (AHABC) — at Joint Base Lewis-McChord, Washington State. The Army said that, as of March, Army Green Berets, Air Force weather personnel, and individuals from unnamed civilian agencies had gone through the training program. Capt. Tyler McWilliam, described as a "High-Altitude Planner," said the AHABC "have enabled our unit to both maintain individual proficiency and provide more repetitions to leaders to sharpen their HA skills."
The Army has also publicly demonstrated balloon platforms in live exercises. In 2024, balloons fitted with "electromagnetic spectrum sensors and radio networking equipment" were part of the kill chain in a live-fire Precision Strike Missile (PrSM) engagement against a moving target ship during Exercise Valiant Shield 24. In 2024, the Army’s Communications-Electronics Command (CECOM) sought information on small radars and signals intelligence suites for high-altitude balloons as part of an experimentation effort called High-Altitude Platform-Deep Sensing (HAP-DS), which the Army said was intended to feed into a larger program called the High-Altitude Extended-Range Long-Endurance Intelligence Observation System (HELIOS).
Operational ambitions have been explicit. The Army disclosed plans to launch as many as 100 balloons — "and maybe even more" — in an upcoming exercise, and Andrew Evans, Director of Strategy and Transformation with the Office of the Deputy Chief of Staff of the Army (G-2), told Breaking Defense in August 2025: "Our primary goal is to demonstrate autonomous swarming capabilities that generate a persistent, cost-effective presence in the stratosphere." Evans tied that capability to enhanced ISR, extension of tactical communications, and "rapid reconstitution of on-orbit capabilities when space is denied or degraded."
What this means for USARPAC, U.S. Central Command, and manufacturers
- USARPAC and the 921st: The contracting notice specifically targets deliveries within INDOPACOM (Hawaii), and the 921st’s market research role places it at the nexus of any future procurements for the Pacific theater.
- U.S. Central Command (CENTCOM): CENTCOM has previously highlighted interest in lighter-than-air platforms to meet high ISR demand across the Middle East, indicating the Army’s Pacific push is part of a broader service-level interest across theaters.
- Manufacturers (Urban Sky, Aerostar, Sierra Nevada Corporation): Industry products are already integrated into training and demonstrations. The Army’s AHABC uses 16-gore Microballoons made by Urban Sky; Urban Sky markets that design as capable of reaching up to 70,000 feet with payloads up to 50 pounds and offers a Wallabee payload that combines "EO/IR imaging, signals intelligence, and communications downlink." Aerostar and Sierra Nevada Corporation offer broadly similar systems, and SNC has marketed LTA-HAPS solutions for persistent stratospheric ISR and mission systems.
Taken together, the contracting notice and the Army’s expanding training and experimentation programs show a deliberate push to normalize high-altitude balloons as part of a "persistent, all-domain sensor architecture for the Indo-Pacific theater," a phrase used in the Army’s March press release. The notice itself remains market research at this stage; whether it leads to a full competition, purchases, or expanded operational deployments will depend on the next procurement steps and on responses from industry. TWZ has reached out to U.S. Army Pacific for more information.
