MD-11 Relief Pilot reported that while on the first rest; the Captain recalled me from the courier area to the cockpit and informed me of the CRG FIRE LWR FWD / AFT and CABIN SMOKE Level 3 Alerts. The flight crew elected to divert and make a precautionary landing.

Narrative

This report is just being submitted due to a lack of connectivity at our priority divert field. I was the RFO for Aircraft X. While I was on the first rest; the Captain recalled me from the courier area to the cockpit and informed me of the CRG FIRE LWR FWD / AFT and CABIN SMOKE Level 3 Alerts. He also instructed the Load Master to don his oxygen mask. After reaching the cockpit the Captain delegated responsibilities in a timely fashion. The Captain was flying the airplane; the FO (First Officer) was PM (building the approach and handling comm); and I ran the QRH (quick reference handbook). We completed the QRH with the help of both the FO and Captain to reach some switches and work through nuances of the situation. I assisted the FO with some of the ACARS messages and general airfield study. While we were accomplishing these tasks; the Captain quickly descended out of FL340 and got established on ILS final for Runway XX. We executed an uneventful flaps 50 landing about 14 minutes after receiving the initial cargo fire indications. We then taxied to the south ramp where we were inspected by the emergency services on the taxi in. The cause of this priority was multiple level 3 alerts. Maintenance said the MSC failed causing false level 3 alerts.