TDR-90 replacement?
looking for sensible replacement option for existing TDR-90 transponder to enable us to satisfy Elementary Helicopter Mode S regulations.
Current use is for destinations inside designated airspace but generally operating outside CAS with occasional overseas trips to Europe.
Current fit is 2xTDR-90 controlled by CTL-92.
Would like to keep with TDR range but price looks silly for replacement - especially when so many other systems around but - as ever - panel space is priority - hence wish to keep current control head.
Would appreciate suggestions.
AS365N1