🔍 Key Concepts

• COSPAS-SARSAT is an international satellite-based search and rescue (SAR) system • Different distress systems use different frequencies (kHz vs MHz) and different types of signals (voice, digital, coded) • EPIRB (Emergency Position-Indicating Radio Beacon) signals and DSC (Digital Selective Calling) distress signals are not on the same frequency bands

💭 Think About

• Which option correctly matches COSPAS-SARSAT with both the proper frequency band and the type of distress device it supports? • Look at which choices involve satellite detection of beacons rather than ship-to-ship or ship-to-shore voice or DSC calling. • Which frequencies listed are most commonly associated with modern EPIRBs versus older analog or voice distress channels?

✅ Before You Answer

• Identify which answer choice involves satellite detection of coded signals from EPIRBs. • Confirm which frequencies are in MHz vs kHz, and which are typically used for GMDSS satellite alerting. • Eliminate any choices that describe voice calls or DSC on MF/HF rather than automatic beacon signals.