Narrowcast is a selective attentional modulator that interfaces with BCI-adjacent neural pathways to suppress processing of non-threat stimuli while amplifying sensory channels relevant to immediate danger — motion, sound directionality, peripheral movement, and target acquisition. The world does not slow down on Narrowcast, but irrelevant information simply stops registering, creating a state of pure combat cognition stripped of distraction. Originally developed as a focus aid for air traffic and industrial safety, its combat applications were immediately apparent.