obstacle collision avoidance system (OCAS)

airborne collision avoidance system (ACAS)

traffic collision avoidance system (TCAS)

collision avoidance system-equipped aircraft

airborne collision avoidance system

aircraft collision avoidance system

autonomous collision avoidance system (ACAS)

collision avoidance system (CAS)

obstacle avoidance system (OAS)

collision avoidance

collision avoidance drone

obstacle avoidance

obstacle avoidance drone

anti-collision system

contamination avoidance

hazard avoidance

avoidance

terrain-avoidance / clearance radar

antipersonnel obstacle breaching system (APOBS)

collision regulations (COLREGS)

lead collision course

midair collision control

near collision

unavoidable collision

aerial collision

air collision

approach lights collision

avert collision

avoid collision

bird collision

mid-air collision

midair collision accident

midair collision hazard