The Garmin 430/530 installation manual documents a connection from the
430/530 serial output to the 195/295/296/396/196 serial input. Set the
430/530 to "Aviation Out" and the handheld to "Aviation In" and use the
combined data/power cable available from Garmin. It should take less than 2
hours of avionics tech time and under $100 of parts.

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Richard Kaplan

www.flyimc.com