A type 4 deflector shield was a type of Federation deflector shield. By the late 24th century, they were considered only a slight deterrent to disruptor weapons.

In 2370, a Federation science station and ruins of a Sakethan burial mound on Calder II were protected by a type 4 deflector shield. Aboard a mercenary ship, Jean-Luc Picard was able to fire a phase-resonant disruptor pulse and disable the shields with one shot. (TNG: "Gambit, Part I")

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