What action should a GMDSS Radio Operator take when SafetyNETTM Distress or Urgency messages are received by the vessel's EGC receiver?

Correct Answer: Option B — Aural and visual alarms are activated, and require manual deactivation.

Under USCG National Maritime Center examination standards, the accepted correct answer is: Aural and visual alarms are activated, and require manual deactivation..