Short story several decades old, about cat navigator or co-pilot of a spaceship and its human partner. They were isolated in different compartments, communication telepathic only, no visual or audio contact. Each life depended on the other.
Could this be The Game of Rat and Dragon by Cordwainer Smith?
The story takes place in the far future. Human travel in outer space is threatened by strange creatures known as the Dragons. Imperceptible to ordinary people, Dragons are experienced as nothing but a sudden death or insanity. Dragons can only be destroyed by very strong light, but they move too fast for conventional defense methods. Both human and telepathic cats (who perceive the dragons as rats) are able to sense the creatures within milliseconds. The humans and cats work together as teams to protect interstellar spaceships traveling via planoforming (a type of faster than light speed travel). The cats ride outside of the spaceships in their own tiny crafts, waiting for the order from their human partner to attack. Pin-sets (telepathic amplifiers) heighten a telepath’s senses and allow the humans to communicate with their partner cats. The cats then destroy the Dragons with "pinlights", miniature nuclear bombs whose blast gives off pure visible radiance that can destroy the dragons. Thanks to the combination of the human mind and the cats' quick reactions, the battle against the Dragons is not only possible, but usually ends in victory.
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