Mission System Operator (MSO) Standardization Practice Test

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Which radio families are explicitly mentioned as capable of secure voice transmissions via KY-58s?

UHF radios only

VHF radios only

UHF and VHF radios

Secure voice transmissions with the KY-58 depend on compatibility between the cryptographic device and the radio family. The manuals explicitly indicate that the KY-58 supports secure voice on both UHF and VHF radio families. This means you can encrypt voice over those bands when using KY-58s. HF radios aren’t listed as compatible for secure voice with the KY-58 in standard references, so they aren’t part of the supported set. Therefore, the correct choice is that both UHF and VHF radios are explicitly mentioned as capable.

HF radios only