What activation mode is used to load HAIPE COMSEC into the radio?

The correct activation mode for loading HAIPE COMSEC into the radio is DS-101. This mode refers specifically to the manual loading of cryptographic keys into the radio system, utilizing an established standard for secure communications. The DS-101 format provides a method for users to enter cryptographic keying information directly through a secure interface, ensuring integrity and security.

In the context of secure communications, DS-101 allows for a controlled and deliberate process of keying which is crucial for maintaining the confidentiality and integrity of the transmitted information. This method is particularly key for operations where the automated loading mechanisms may not be suitable, or where a Layer of human verification is desired to enhance security.

In contrast, other options like DS-102 typically refer to different processes for key management or loading scenarios that automate or encrypt communications in a different context. Manual load may also suggest another approach, but the specificity of DS-101 in the context of HAIPE COMSEC makes it the most appropriate answer for loading procedures in secure radios. Automated Mode generally refers to processes that do not require manual input, which does not apply in this situation.