Crj-200 first officer reported a navigation problem which was related to FMS and GPS issues.

Attributes
ACN	1653663
Time
Date	201906
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	GPS & Other Satellite Navigation
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

On our way to destination; we were vectored off course. Then received clearance direct to a fix. While going direct; ATC said that our course was off. We then received radar vectors in VMC to a visual approach without any incident. As we got closer to our destination; that's when it became evident that the FMS position did not match our actual location.system wide GPS failure that required us to auto-tune the FMS. We auto-tuned as the procedure instructed; but during the flight; we manually tuned in vors to cross check our location. By doing this; it changed auto-tune to manual FMS mode. Since we were on radar vectors I could not locate the fix in green needles in a timely manner to cross check that our FMS showed. Because the FMS reverted to manual mode the location was incorrect and was not apparent until we got closer to the destination. Instructions for GPS inop should be more thorough and covered in more depth through initial training; such as using auto-tune and being aware that the FMS revert to manual mode and how to recognize this.

Original NASA ASRS Text

Title: CRJ-200 First Officer reported a navigation problem which was related to FMS and GPS issues.

Narrative: On our way to destination; we were vectored off course. Then received clearance direct to a fix. While going direct; ATC said that our course was off. We then received radar vectors in VMC to a visual approach without any incident. As we got closer to our destination; that's when it became evident that the FMS position did not match our actual location.System wide GPS failure that required us to auto-tune the FMS. We auto-tuned as the procedure instructed; but during the flight; we manually tuned in VORs to cross check our location. By doing this; it changed auto-tune to manual FMS mode. Since we were on radar vectors I could not locate the fix in green needles in a timely manner to cross check that our FMS showed. Because the FMS reverted to manual mode the location was incorrect and was not apparent until we got closer to the destination. Instructions for GPS inop should be more thorough and covered in more depth through initial training; such as using auto-tune and being aware that the FMS revert to manual mode and how to recognize this.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.