in the cheeks of the forward fuselage for increased angular coverage. The nose antenna is tilted backwards for stealth. Moreover, the side-looking radar could enable the Su-57 to employ beaming tactics while still able to guide its own missile. The suite also has two N036L-1-01 L band transceivers on the wing's leading edge flaps that are not only used to handle the N036Sh Pokosnik (Reaper) friend-or-foe identification system but also for electronic warfare purposes. Processing of the X- and L-band signals by the N036YeVS and GRPZ Solo-21 computers enable the system's information to be significantly enhanced. The L402 Himalayas ECM suite made by the Kaluga Research Radio Engineering Institute uses both its own arrays and the N036 radar system, with one of its arrays mounted in the dorsal sting between the two engines. Redundant radio telephone communication and encrypted data exchange among various aircraft and also command centers (ground and sea-based and airborne) are provided by the S-111 system, developed by Polyot. The UOMZ 101KS "Atoll" electro-optical system consisted of the 101KS-V infrared search and track (IRST), 101KS-O directional infrared counter measures (DIRCM), 101KS-U ultraviolet missile approach warning sensors (MAWS), 101KS-P thermal imager for low altitude flight and landing, and 101KS-N navigation and targeting pod. The IRST turret is mounted on the starboard side in front of the cockpit and can track multiple targets simultaneously. When not in use, the receiver is turned backwards and its rear is treated with RAM to preserve stealth. Additionally, the Su-57 is the first fighter to mount a DIRCM system, with one turret mounted behind the canopy and another mounted under the cockpit. The aircraft is capable of deploying countermeasures such as flares and radar decoys, as well as single-use programmable ECM transmitters. The dispensers for these countermeasures are mounted in the tail boom between the engines. For in-flight navigation, the Su-57 uses the BINS-SP2M inertial navigation system developed by Concern Radio-Electronic Technologies (KRET). The system can also integrate with GLONASS, and is controlled by the IVS-50 computing system. In 2016, KRET announced it is developing a multifunctional video processing system called "Okhotnik" (Hunter) to increase the Su-57's target detection range as well as to improve automatic detection and tracking of targets. A monitoring system allows real-time assessment of the aircraft's condition and predict the remaining 'life' of the composite parts of the aircraft by transmitting information through optical fibers, with sensitivity to mechanical