The Indian Air Force (IAF) is strengthening its air defence in Ladakh along the Line of Actual Control (LAC) with China by putting in place a series of special mountain and light-weight radars, Indian Express reported on Friday. Western Air Command chief Air Marshal NAK Browne told reporters in New Delhi on Thursday that different types of radars would be put in place along the 667-km LAC with China, the air defence of which is WACs responsibility. The Air Force is keenly examining the option of special type of radars, which we call the mountain radars and we are also looking at Low Level Light Weight Radars. So there is a definite plan, Browne said to a question on the future air defence systems along the LAC. The move comes close on the heels of reports of recent incursions by Chinese military helicopters into India. Browne said the IAF would put in place these radars in the next four to five years to make the air defence system along the LAC robust.