Starfleet communicator badges are worn by all personnel on the left breast and are in the shape of the Starfleet logo. Personalized to the user and activated by the touch of a finger, commbadges can be used to track the user in an emergency. Communicators are composed of a crystalline composite of silicon, beryllium, carbon-seventy, and gold. When accessing a computer, the communicator of the person at the terminal logs in the user information, thereby making it possible to trace back who accessed the computer.
Communicators also display the wearers' department, and those worn by enlisted personnel have a device attached beneath indicating their rating.
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| Command | Flight Control | Tactical |
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| Operations | Security | Engineering |
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| Sciences | Medical | Intelligence |
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| Starfleet Training Command (Including students) |
Starfighter Pilots | Starfleet Marine Corps |