Aliases

Disambiguation

Mode 5 refers to the military Identification, Friend or Foe (IFF) transponder standard. NOT to be confused with civilian transponder Mode 5 (which is not commonly used) or other aviation 'Mode' designations.

Stats

Concept

Mode 5 is the modern military Identification, Friend or Foe (IFF) transponder standard used by the U.S. military and NATO forces, providing cryptographically secured aircraft identification with GPS position data and anti-jamming capabilities.

Mode 5 é o padrão moderno de transponder Identification, Friend or Foe (IFF) militar utilizado pelas forças militares dos EUA e da OTAN, fornecendo identificação de aeronaves com criptografia securizada, dados de posição GPS e capacidades anti-jamming.

Enrichment

• Identification friend or foe
  Wikipedia▎ high· 2026-05-14
  • Mode 5 is military-only cryptographically secured version of Mode S with GPS position capability
  • NATO adopted STANAG 4193 for Mode 5 in 2002
  • Full NATO Mode 5 capability anticipated by 2030 per STANAG 4570
  • Transition began around 2016 with challenges in cryptographic key management
• IFF and Mode 5: Past Present and Future
  Telinstrument (Defense Contractor Avionics)▎ high· 2026-05-14
  • U.S. Joint Chiefs of Staff ordered Mode 5 development in 1995 to replace Mark XII Mode 4
  • Mode 5 uses spread spectrum overlay on 1030 and 1090 MHz ATC frequencies
  • Mode 4 crypto keys ceased generation in June 2020; Mode 5 is now exclusive U.S./NATO standard
  • Major manufacturers include BAE, Raytheon, Telephonics, Leonardo, Thales, Hensoldt
• IFF Mode 5 | BAE Systems
  BAE Systems (Defense Contractor)▎ high· 2026-05-14
  • Mode 5 employs spread-spectrum radio with difficult-to-intercept transmissions
  • Features secure data encryption with keys that change every few seconds
  • Includes lethal interrogations designed to prevent fratricide before weapons engagement
  • Level 1 and Level 2 response modes: Level 1 for identification, Level 2 adds GPS position