Which system is NOT part of the ATN family of systems?

The Trojan system is indeed not part of the ATN (Advanced Tactical Network) family of systems, which focuses on communications and data networking for military environments. The ATN family includes systems designed to enhance interoperability, secure communications, and situational awareness among military units.

The NEC (Network Enabled Capability) is an overarching framework that integrates various systems for improved operational effectiveness, and is part of the ATN landscape. The AN/PRC-148 and AN/PRC-150 are both tactical radios that support ATN protocols, enabling secure voice and data communications on the battlefield.

In contrast, the Trojan system, while it may serve other military functions, does not align with the core communication capabilities and standards established by the ATN model. Recognizing these distinctions helps clarify the specific technologies and approaches within military communications.