U.S. military UAS groups

The U.S. Department of Defense (DoD) employs Unmanned Aerial Systems (UAS) across all echelons to support tactical, operational, and strategic operations. The types of UAS that are used in these operations are categorized into "Groups" according to their size and capability. Previous to 2010, UAS were categorized into "Tiers" or "Classes" separately by each branch of the military. In order to promote a homogeneous categorization, the "group system" was developed.^[1][2][3]

DoD UAS Groups

The "Group" system has 5 categories, from 1 to 5, with each category increasing in capability.^[4]

UAS Group	Maximum weight (lbs) (MGTOW)	Nominal operating altitude (ft)	Speed (kts)	Representative UAS
Group 1	0–20	< 1,200 AGL	100	RQ-11 Raven, WASP
Group 2	21–55	< 3,500 AGL	< 250	ScanEagle
Group 3	< 1,320	< FL 180		RQ-7B Shadow, RQ-21 Blackjack, NAVMAR RQ-23 Tigershark
Group 4	> 1,320		Any airspeed	MQ-8B Fire Scout, MQ-1A/B Predator, MQ-1C Gray Eagle
Group 5		> FL 180		MQ-9 Reaper, RQ-4 Global Hawk, MQ-4C Triton

Tier System (Deprecated)

The previous classification system, termed the "Tier System", was used by military planners to designate the various individual aircraft elements in an overall usage plan for integrated operations.^[5] The Tiers do not refer to specific models of aircraft, but rather roles the aircraft would fill. The U.S. Air Force, U.S. Marine Corps, and U.S. Army each have their own tier system, and the systems are themselves not integrated.

US Air Force tiers

• Tier N/A: Small/Micro UAV. Role filled by BATMAV (Wasp Block III).^[6]
• Tier I: Low altitude, long endurance. Role filled by the Gnat 750.^[7]
• Tier II: Medium altitude, long endurance (MALE). Role currently filled by the Predator and MQ-9 Reaper.
• Tier II+: High altitude, long endurance conventional UAV (or HALE UAV). Altitude: 60,000 to 65,000 feet (19,800 m), less than 300 knots (560 km/h) airspeed, 3,000-nautical-mile (6,000 km) radius, 24‑hour time-on-station capability. Complementary to the Tier III- aircraft. Role currently filled by the RQ-4 Global Hawk.
• Tier III-: High altitude, long endurance low-observable UAV. Same parameters as, and complementary to, the Tier II+ aircraft. The RQ-3 DarkStar was originally intended to fulfill this role before it was "terminated".^[8][9] Role now filled by RQ-170 Sentinel.

US Marine Corps tiers

• Tier N/A: Micro UAV. Wasp III fills this role, driven largely by the desire for commonality with the USAF BATMAV.^[10][11]
• Tier I: Role currently filled by the Dragon Eye but all ongoing and future procurement for the Dragon Eye program is going now to the RQ-11B Raven B.
• Tier II: Role currently filled by the Scan Eagle and the AAI RQ-7 Shadow.
• Tier III: For two decades, the role of medium range tactical UAV was filled by the Pioneer UAV. In July 2007, the Marine Corps announced its intention to retire the aging Pioneer fleet and transition to the RQ-7 Shadow tactical unmanned aircraft system by AAI Corporation. The first Marine Shadow systems have already been delivered, and training for their respective Marine Corps units is underway.^[12][13]

Role currently filled by the AAI RQ-7 Shadow, although USMC planners do not view this aircraft as meeting future Tier III requirements.^[14]

US Army tiers

• Tier I: Small UAV. Role filled by the RQ-11A/B Raven.
• Tier II: Short Range Tactical UAV. Role filled by the RQ-7A/B Shadow 200.
• Tier III: Medium Range Tactical UAV. Role currently filled by the MQ-5A/B Hunter and IGNAT/IGNAT-ER, but transitioning to the Extended Range Multi-Purpose (ERMP) MQ-1C Gray Eagle.

Future Combat Systems (Cancelled)

Future Combat Systems (FCS) was the United States Army's principal modernization program from 2003 to early 2009.

• Class I: For small units. Role to be filled by all new UAV with some similarity to Micro Air Vehicle.
• Class II: For companies (cancelled).^[15]
• Class III: For battalions (cancelled).^[15]
• Class IV: For brigades. Role to be filled by the RQ-8A/B / MQ-8B Fire Scout.

References

1. Department of Defense. "Unmanned Aircraft System Airspace Integration Plan" (PDF). Retrieved 2015-08-06.
2. U.S. Army. ""U.S. Army Roadmap for UAS 2010-2035"" (PDF). Retrieved 2015-08-06.
3. Chairman of the Joint Chiefs of Staff. "Joint Unmanned Aircraft Systems Minimum Training Standards" (PDF). Retrieved 2015-08-06.
4. Department of Defense. "Unmanned Aircraft System Airspace Integration Plan" (PDF). Retrieved 2015-08-06.
5. Office of the United States Secretary of Defense. "UAV Roadmap 2005–2030" (PDF). Retrieved 2007-08-24.
7. "Unmanned Aerial Vehicles". Archived from the original on January 11, 2012. Retrieved January 12, 2012.
8. Comparison of USAF Tier II, II+ and III- systems Archived August 19, 2007, at the Wayback Machine.
9. USAF Tier system Archived May 14, 2006, at the Wayback Machine.
11. "AeroVironment, Inc.: AV Press: United States Marine Corps Awards AeroVironment $19.3 Million BATMAV Contract for Wasp III Micro Unmanned Aircraft Systems". Archived from the original on December 8, 2008. Retrieved March 19, 2015.
12. "MCCDC, MCSC - Coordinated UAV Endorsement Brief". Archived from the original on June 25, 2008. Retrieved August 8, 2008.
13. "Navy League of the United States - Citizens in Support of the Sea Services". Archived from the original on February 7, 2012. Retrieved August 8, 2008.
14. USMC RQ-7 Shadow Homepage
15. "Defense Tech: FCS Watch Archives". Archived from the original on August 11, 2007. Retrieved August 24, 2007.