оптична розвідка
electro-optical countermeasures
electro-optical sensor
electro-optical system
optical decoy
optical device
optical electronic countermeasures
optical flash
optical gas mask
optical homing
optical mine-hunting
optical munitions
optical range
optical relay
optical sight
optical target-sensor
optical tracking
artillery optical reconnaissance
electro-optical warfare system
helmet-mounted optical display
optimized optical link helmet-mounted display
optical communication
optical receiver
optical transmitter
optical-fiber communication
radio-optical line of sight
electro-optical glide bomb
over-the-horizon optical communication
Secret Intelligence Service (SIS) / Military Intelligence, Section 6 (MI6)
tactical intelligence / combat intelligence
undeclared member of the intelligence or counter-intelligence agencies
accurate intelligence
acoustic intelligence