grid navigation meaning in Hindi

Examples

1. In order to perform reconnaissance, for example, the crews had to perfect the grid navigation system for polar flying, a complex method which until that time had not been systematically tested.
2. At that time, flights were conducted without navigational aids, and the aircraft landing on the constantly moving iceberg T-3 was performed solely by dead reckoning and celestial grid navigation, which was often hampered by long periods of twilight which prevented celestial observation.