CL-65 CREW HAD A COMPUTER CRASH THAT AFFECTED MULTIPLE NAV AND ACFT SYS. THE CREW WAS REQUIRED TO GET HDGS FROM THE CTLR TO GET TO THEIR DEST. THE ONLY OPERATIVE RELIABLE SOURCE OF INFO WAS THE WHISKEY COMPASS.

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JAN/TUE/04; MSP DIRECT CWA; FPR: MSP.SNINE5.GEEZE. CWA. FLT TIME ESTIMATED TO BE 32 MINS. ON SNINE5 DEP PROC ENRTE TO CWA; LEVEL AT 17000 FT. AT 10 MI PRIOR TO SNINE WE EXPERIENCED MULTIPLE MASTER CAUTION MESSAGES (STALL FAIL; EFIS COMP MON; FMS DR; FMS DR EXCEEDS 5 MINS). DURING THIS TIME; ZMP NOTIFIED US THAT WE WERE OFF THE AIRWAY AND ASSIGNED DIRECT GEEZE. WE RELATED TO CTR THAT WE JUST EXPERIENCED MULTIPLE NAV FAILURES AND REQUESTED A HDG TO GEEZE. CTR ASSIGNED US A HDG TO GEEZE AND WE COMPLIED NAVING VIA OUR STANDBY COMPASS (WHISKEY COMPASS). WE THEN VERIFIED OUR ON-COURSE HDG WITH CTR EVERY FEW MINS IN INTEREST OF SAFETY. ONCE HANDED OFF TO THE NEXT CTLR; WE WERE GIVEN ANOTHER HDG DIRECT CWA. WITH THE GUIDANCE OF THIS CTLR; AND BACKED UP BY OUR ADF ONCE IN RANGE; THE REMAINING FLT CONTINUED WITHOUT INCIDENCE. ONCE ON THE GND IN CWA; WE CONTACTED OUR MAINT CTLR TO TROUBLESHOOT ALL PREVIOUS FMS FAILURES AND RELATED MASTER CAUTIONS. ACFT WAS 'PWRED DOWN' AND ALL SYS WERE RESET IN ACCORDANCE WITH MAINT CTL DIRECTIVES. ACFT WAS FLOWN TO DTW WITHOUT FURTHER INCIDENCE. BOTH CAPT'S AND THE FO'S FMS SCREENS MATCHED ONE ANOTHER THROUGHOUT THE FLT. AFTER INITIAL NOTIFICATION (ALERT) FROM ZMP OF DEV; FMS SCREENS WERE XREFED TO STANDBY COMPASS EVERY FEW MINS. HDG DEVS RANGED FROM 10-20 DEGS THROUGHOUT THIS FLT. PLEASE NOTE: UNTIL THE SIMULTANEOUS MASTER CAUTIONS AND ZMP RADIO CALL; WE HAD NO INDICATION THAT WE WERE OFF THE DEP PROC.