What NSA certified radio does not require external encryption?

The AN/PRC-150 is a radio that does not require external encryption due to its built-in cryptographic capabilities. This radio is designed specifically for secure voice communications and has integrated secure communications features, ensuring that data can be transmitted securely without needing additional encryption devices.

In contrast, other radios listed, such as the AN/PRC-148 and AN/PSC-5D, typically require the addition of external encryption equipment to protect communications. The AN/PRC-150's inherent security features make it particularly suitable for military operations where secure communication is critical. Its ability to function independently with encrypted transmission simplifies operational logistics and enhances communication security in the field.