Regional Jet 200 ER/LR (CRJ200)
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Confusion; Communication Breakdown; Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors
We were being vectored by Approach for the ILS on a left base; a heading of 140 at 4400 feet. I went to tune the CTAF frequency into the active of Com 2 and the standby of Com 1 so I could start listening to see if any GA traffic was in the circuit. We were still on our heading of 140 passing through the Localizer of the ILS which both the Captain and I found very strange. Especially since we had briefed and were aware of the surrounding terrain. Because of this the Captain had the Weather page on his side and I had terrain on mine. So I could see the terrain was starting to rise. I then noticed that the CTAF had somehow ended up in the active of both Com 1 and 2; once I noticed this I swapped frequencies in Com 1 and immediately contacted center (which was in the standby) they then put us back on to approach who then vectored us back around for the ILS and got us to climb to 5000 in order to avoid terrain. During the turn we did momentarily get a terrain caution message.The cause of this event is through myself incorrectly setting the frequencies. I am unsure how it occurred however a more careful approach will need to be taken in future.
CRJ-200 First Officer reported a loss of communication and terrain warning following an error in radio panel management.