Consider the following statements about GAGAN (GPS Aided GEO Augmented Navigation):
Statement I: GAGAN is a Satellite-Based Augmentation System (SBAS) developed jointly by ISRO and Airports Authority of India (AAI).
Statement II: It provides precision navigation services to aircraft, enhancing the accuracy and integrity of GPS signals for civil aviation.
Statement III: GAGAN improves navigation accuracy from 10-15 meters to within 1-2 meters, enabling precision approaches and landings at airports.
Statement IV: India became the fourth country in the world to implement such a system for civil aviation, after the USA (WAAS), Europe (EGNOS), and Japan (MSAS).
Which one of the following best describes the relationship between the above statements?