прихована / таємна діяльність (про розвідку / термін спецслужб)
clandestine operation; covert operation
covert
covert action
covert activities
covert amphibious entry
covert attack
covert delivery
covert forces
covert intelligence
covert propaganda
covert warfare
covert way
carry out covert action
covert influence operation
covert intelligence officer identities
covert intelligence work
covert ops
information from covert sources
covert action activities
covert action operation
covert operation
counter-riot control activity
dummy activity
enemy activity
hostile activity and influences
monitoring arms implementation and compliance activity
SALUTE (Size; Activity; Location; Unit; Time; Equipment)
subversive activity
supply support activity (SSA)
terrorist-related activity
mobilization activity
Military Standard Activity Address Dictionary