The Indian Air Force (IAF) is to issue RFI for procuring bird-detection radars or avian radars fourth time in 10 years. The earlier tenders for bird-detection radars had drawn the interest of M/s Robin Radar Systems, M/s Data Patterns (India) Pvt. Ltd. and M/s Axiscades Aerospace and Technologies Pvt. Ltd. The plan is likely to procure 45 avian radar systems for Rs 250 Crores - 39 for the IAF and 6 for the Indian Navy.