Is the Garmin GNS 430 compatible?
Yes. Sandel and Garmin have worked together to create an extremely simple interconnect scheme using the ARINC 429 digital data bus. A single GNS 430 interfaces to an SN3308 with a total of only four wires! (A dual GNS 430 configuration may require a small relay, but is still an extremely simple interface.) All VOR, ILS, GPS and map data, as well as annunciators, flags and switching commands are handled via the ARINC 429 bus. Both the GNS 430 and the SN3308 require updated versions of software to support this interconnect. The SN3308 must be at hardware revision MOD 1 or later and software revision V1.30 or later. All SN3308s delivered after mid-March 1999 are at these revision levels. Older units will be upgraded free of charge but must be returned to the factory for the MOD1 upgrade. Contact Sandel at 760-727-4900 for details. With the ARINC 429 interface, nav source selection can be made from either the SN3308 or the GNS 430. Pressing the NAV button on the SN3308 will command the GNS
