The Combat Survivor Evader Locator (CSEL) combat search and rescue communications system is like a global 911 emergency call system for downed personnel, providing U.S. forces with a tactical advantage. With this easy-to-use, multifunction radio system, rescue forces can quickly locate, authenticate and communicate with isolated personnel for urgent recovery operations. The CSEL system uses a flexible, modular communications architecture over multiple satellite links for dependable, secure communications. The system features military-precision Global Positioning System (GPS) technology, which offers greater security and accuracy than commercial GPS.