Trouble with nav radio in Cessna 172 and Caravan 208 Couriour

[CD0139]

Looks like you have your comms set to 8.33 kHz channel spacing as the two frequencies you’re flipping between are 8.33 kHz channels. 111.75 kHz is a 25 kHz channel. You can change it in the 430/530 menues.

This thread should help:

GNS 530: how to change channel spacing from 25kHz to 8.33?

Hey all How do I (in the default Asobo Cessna 172 (analogue!) with the GNS 530 change the Com channel spacing? In Europe it needs to be 8.33… in the US 25kHz… How do I change that? Kind regards, Oliver

This might be of interest:

34196.pdf