GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?I.It is designed to provide additional accuracy and integrity.II.It will allow more uniform and high quality air traffic management.III.It will provide benefits only in aviation but not in other modes of transportation.Select the correct answer using the code given below

1. A

   I, II and III

   I, II and III. III fails: GAGAN is not aviation-only.

2. B

   II and III only

   II and III only. III fails, and I is dropped.

3. C

   I only

   I only. II is also keyed.

4. D

   I and II only

   I and II only. Extra accuracy and integrity, and better ATM. Benefits are not confined to aviation.

Summary. Official Set A key is (d) I and II only. GAGAN is India’s SBAS: extra accuracy and integrity for GNSS (I) and more uniform air-traffic management (II). It is also used in other modes (survey, rail, roads). III’s ‘aviation only’ is false. So I and II.