Question

What are the advantages of HMS (Helmet Mounted Sights) over HMD?

(a) Display flight data in the pilot’s line of sight

(b) Provide target locking capabilities by looking at the target

(c) Provide a FOV of 360°

(d) Provide enhanced vision by combining radar and FLIR

This question was addressed to me during an online exam.

Question is taken from Helmet Mounted Displays topic in portion Displays and Man-Machine Interaction of Avionics

Answer 1

The correct answer is (b) Provide target locking capabilities by looking at the target

Explanation: A Helmet Mounted Sights in combination with a head tracker system provides effective means for the pilot to lock on to target. The pilot can look at the enemy aircraft and lock on to it. The relative position of the enemy is then calculated by the head position of the pilot and sent to missiles to engage the target. A typical seeker head needs to be pointed to within about 2° of the target to achieve an automatic lock on.