The document contains codes and their meanings used in emergency communications by BNPB, the Indonesian National Board for Disaster Management. Some codes include: 11-10 for receiving a signal report, 11-11 for poor signal reception, 11-12 for good/clear reception. Other codes relate to requesting ambulances, paramedic assistance, fire trucks, or a bomb squad. Code 11-99 indicates an under attack situation and immediate assistance is required.