LTR 400 Transponder and CADU

Identify friends, prevent fratricide


  • Air Platforms: Helicopter, Aircraft, UAVs, Fighter Aircraft 
  • Naval Platforms:  Submarines,  Dock landing ships, small frigates, OPVs, etc


With latest state-of-the-art of technology IFF Mode 5 standard, LTR 400 is a Lightweight Transponder which can be used without restrictions for both civilian air traffic control and military applications to identify friendly units.

LTR 400 Transponder can be either controlled and monitored by the CADU (Control And Display Unit) or integrated in a compliant avionics system using cockpit multi-function displays for control. As part of the IFF and Mode S on-board system, CADU can be fitted in the cockpit area of the aircraft or in a Naval Cabinet System.  


  • Mode 1, 2, 3/A, C, 4, 5 L1+L2, S Enhanced, ADS-B
  • Compatible with Mode 4/5 crypto computers QRTK-3BNG, KIV77
  • MIDS compatible
  • TCAS II compatibility

Main Benefits

  • Light weight
  • Easy to ingrate into platforms, designed with a flexible and simplified logistic concept, offering standards interfaces (RS-485, ARINC 429 and MIL-STD-1553B).
  • Optimized for operational use at day and night, CADU provides anytime a full control and indicator functions display capability of LTR 400 transponder for civil and military applications including dimmable indicators, display and backlight
  • Certified interoperability in accordance with, STANAG 4193 Part I-VI, Edition 3  and DoD AIMS 17-1000, ED-73E/DO-181E and ED102A/DO-260B
  • Certified airworthiness with the EASA European Aviation Safety Agency (equivalent to the FAA), LTR 400-D ETSO authorisation EASA.21O.10083649

LTR 400 is successfully integrated and in operation in a lot of different platforms.

Product Impressions

Product Impressions

Product Impressions






We provide target-group-oriented standard training courses for operators, maintainers/technicians and administrators, that can also be customized to your specific needs for this product.

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