B777-200
Flight Crew Air Transport Pilot (ATP)
Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Landed As Precaution; Flight Crew Diverted; General Declared Emergency
Aircraft
I was on the second break around 4 hours into the flight when awakened by the Number 1 FA and told that the cockpit had a problem and wanted me up there. I entered the cockpit and smelled a heavy electrical odor but no smoke. We donned our O2 masks; completed the checklists for Smoke; Fire or Fumes and Smoke or Fumes Removal. We were around 320 NM north of a suitable diversion airport; so we declared an emergency with Center and diverted there. Weather was VFR and we landed without further incident.
B777 Captain reports being awakened during his break on a flight to South America and informed of electrical fumes in the cockpit. No source is discovered and the Captain elects to divert to the nearest suitable airport.