FANS over Iridium is a lower cost solution for aircraft that do not currently have a FANS 1/A+ compatible Inmarsat sitcom.
Operational mandates require FANS 1/A+ for the most wind-efficient North Atlantic Ocean (NAT) flight tracks. After Jan. 30, 2020, aircraft without FANS 1/A+ will not be permitted to operate in NAT region above 28,000 feet/8,534 meters
The ST 4300 combines global voice and data functionalities into a single box to reduce weight and box count. It takes everything Iridium can offer, including FANS and ACARS, and lets the customer configure cabin and flight deck connectivity based on their own needs and budget.