B767 CREW DISCOVERED THEY HAD NO NAV DATA ON THE MOVING MAP.

Narrative

INCIDENT OCCURRED DURING TKOF FROM PARIS. UNDER TWR AND DEP CTL. WX WAS VMC AND DAYLIGHT ON AN IFR FLT PLAN. DURING COCKPIT SETUP FOR THE FLT; I LOADED RWY 27 AND THE AMOGA 8A DEP INTO THE FMC. THE FO ADVISED THAT HE CHKED THE RTE AND DEP LOADED. I NOTED THAT THIS WAS AN RNAV SID AND MADE A NOTE OF THE INITIAL TURN TO 331 DEGS. TAXI OUT WAS NORMAL AND THE FO MADE THE TKOF. AFTER LIFTOFF; THE FO ADVISED THAT HE HAD NO TRACK ON HIS NAV DISPLAY. I CHKED MY NAV DISPLAY AND SAW NO TRACK AND ADVISED HIM THAT I WAS GOING TO HDG SELECT TO GIVE HIM RWY HDG STEERING INFO. ABOUT 1 MI PAST THE END OF THE RWY; I ADVISED THAT I WAS TURNING HIM TO THE INITIAL HDG OF 331 DEGS. AT ABOUT THIS TIME THE TWR CALLED AND ADVISED THAT WE WERE ON THE AMOGA DEP. I ADVISED THAT AT THIS TIME THAT HE HAD LOST OUR NAV AND REQUESTED RADAR VECTORS. THE TWR GAVE ME A HDG WHICH I SELECTED FOR THE FO. HE THEN SWITCHED ME TO DEP CTL AND I CHKED IN AND ADVISED THAT WE HAD LOST PART OF OUR NAV AND REQUESTED RADAR VECTORS. HE GAVE ME ANOTHER HDG AND I THEN ASKED FOR DIRECT TO AMOGA. HE GAVE ME A HDG FOR DIRECT AMOGA AND I SELECTED AMOGA ON THE FMC AND FLEW DIRECT. I NOW REALIZE THAT I COULD HAVE HAD A RADIO BACKUP ON THIS RNAV DEP. WHEN THE FMC INFO DROPPED OUT; I COULD HAVE REVERTED BACK TO BASIC NAV. THIS HAS ALWAYS BEEN MY STANDARD PROC IN THE PAST; BUT IN THIS INSTANCE WITH THE RNAV DEP; I DID NOT REALIZE THAT THE RADIO INFO WAS AVAILABLE FOR THE BACKUP.