A common passive flat panel style phased array antenna listening system intended to monitor the radio and microwave regions of the electromagnetic spectrum. Primarily intended to serve as a passive electronic intelligence tool to monitor both conventional EM emissions and less conventional FTL doped versions. These systems are primarily used in the roles listed below.

• Electronic Signals Intellgence
• Electronic Traffic Analysis
• EM Threat Warning Receiver
• Radio/Microwave Direction and Tracking

PEMA type systems are primarily used on Colonial Pact military, civil security, and commercial vessels. However sensor systems of this type are often provided to client states or trusted private interests.