A great replacement for your old Nav Comm unit.
The Comm function of the GNC255B contains a quality receiver with very good noise filtering capability, and a transmitter with 16W output.
It has a good quality 2 place intercom
The Nav side has a VOR/LOC receiver and unlike most othe manufacturers it has an integrated GS (Glideslope) receiver.
For more information Click Here to access the Garmin website GNC255B page.