Signals intelligence operational platforms by nation

Signals intelligence (SIGINT) refers to the collection and analysis of electronic signals and communications to gather intelligence. Different nations utilize a variety of platforms for SIGINT operations, which can be broadly categorized into three main types: airborne platforms, land-based systems, and space-based platforms. Below is an overview of some nations and their SIGINT operational platforms. ### United States - **Airborne Platforms**: The U.S. operates various aircraft like the **RC-135** series (e.g.