Description: SAAB - R4 AIS Saab’s R4 AIS solution uses a common hardware platform that is software upgradable to meet future requirements. It can also be software upgraded for other product versions, e.g. to Secure AIS. he R4 AND R5 system features cutting edge digital radio technology, resulting from more than five years’ research into software defined radios. Sharing radio technology with military grade systems, the R4 AND R5 technology is a big leap forward into the future of AIS radios. The highly versatileR4 AND R5 platform will continue to evolve as new requirements are introduced, and will remain at the forefront of AIS technology for many years to come. The SUPREME version of the R4 AND R5 technology provides the user with a flexible, future-proof product. The large colour touch-screen display and multitude of interfaces make the system highly appropriate for integration into modern networked bridge solutions. Reconditioned unit tested & found in good working condition. we have all spares available. Save money & planet Earth: buy reconditioned spares from our stock.Sve your Money .