This publication discusses current voice and data tactical radio systems in common use between the services. It describes recent updates to the Single-Channel Ground and Airborne Radio System (SINCGARS), including the Advanced System Improvement Program (ASIP) and the Internet controller (INC). It also reviews the operational procedures for SINCGARS for both analog and digital operations in a joint environment. This manual also describes the Enhanced Position Location Reporting System (EPLRS). This publication standardizes joint operational procedures for SINCGARS and provides an overview of the multiservice applications of EPLRS.