I 
119TH CONGRESS 
1ST SESSION H. R. 3848 
To direct the Secretary of Defense to conduct a study on the feasibility 
of, and cost associated with, equipping all fixed wing and rotary wing 
aircraft of the Department of Defense that operate in highly trafficked 
domestic airspaces with air-to-air and air-to-ground collision detection 
systems, and for other purposes. 
IN THE HOUSE OF REPRESENTATIVES 
JUNE 9, 2025 
Mr. MILLS (for himself, Mr. MCCORMICK, Mr. VINDMAN, Mr. LUCAS, and 
Mrs. KIGGANS of Virginia) introduced the following bill; which was re-
ferred to the Committee on Armed Services 
A BILL 
To direct the Secretary of Defense to conduct a study on 
the feasibility of, and cost associated with, equipping 
all fixed wing and rotary wing aircraft of the Department 
of Defense that operate in highly trafficked domestic 
airspaces with air-to-air and air-to-ground collision detec-
tion systems, and for other purposes. 
Be it enacted by the Senate and House of Representa-
tives of the United States of America in Congress assembled, 
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SECTION 1. SHORT TITLE. 
This Act may be cited as the ‘‘Collision-Limiting 
Operational Upgrade for DOD Aircraft Act’’ or the 
‘‘CLOUD Aircraft Act’’. 
SEC. 2. DEPARTMENT OF DEFENSE STUDY ON FEASIBILITY 
OF EQUIPPING ALL MILITARY FIXED WING 
AND ROTARY WING AIRCRAFT WITH AIR-TO- 
AIR AND AIR-TO-GROUND COLLISION DETEC-
TION SYSTEMS. 
(a) FEASIBILITY STUDY REQUIRED.—The Secretary 
of Defense, in coordination with the Administrator of the 
Federal Aviation Administration, shall conduct a study on 
the feasibility of, and cost associated with, equipping all 
fixed wing and rotary wing aircraft of the Department of 
Defense that operate in highly trafficked domestic air-
spaces with air-to-air collision detection systems. 
(b) REPORT.—Not later than 180 days after the date 
of the enactment of this Act, the Secretary shall submit 
to the appropriate committees of Congress a report on the 
results of the feasibility study required under subsection 
(a). Such report shall include the recommendations of the 
Secretary with respect to such results and a timeline for 
carrying out any such recommendations. 
(c) DEFINITIONS.—In this section: 
(1) The term ‘‘air-to-air collision detection sys-
tem’’— 
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(A) means an airborne system designed to 
detect and warn pilots of potential mid-air colli-
sions with other aircraft equipped with tran-
sponders, allowing them to take evasive maneu-
vers to avoid a crash; and 
(B) is compatible with the system used by 
commercial aircraft that is commonly referred 
to as a ‘‘traffic alert and collision avoidance 
system’’ of a ‘‘TCAS’’. 
(2) The term ‘‘air-to-ground collision detection 
system’’ means a system that uses radar, digital ter-
rain maps, and other sensors to warn pilots of po-
tential collisions, and if a collision is likely, to notify 
the pilot through a series of alarms or to automati-
cally take control of the aircraft to avoid the colli-
sion. 
(3) The term ‘‘appropriate committees of Con-
gress’’ means the Committee on Armed Services and 
the Committee on Transportation and Infrastructure 
of the House of Representatives. 
(4) The term ‘‘commercial service airport’’ has 
the meaning given the term in section 47102 of title 
49, United States Code. 
(5) The term ‘‘operate in highly trafficked do-
mestic airspaces’’ means, with respect to aircraft of 
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