🔍 Key Concepts

• On-scene communications during search and rescue (SAR) or marine incidents • Primary use and purpose of VHF Channel 16 • Function of EPIRBs, SARTs, and DSC (Channel 70)

💭 Think About

• Which device and channel are normally used for initial voice contact between vessels and rescue units already in the same area? • Which listed equipment is mainly for alerting and locating, rather than talking back and forth? • When a Coast Guard or rescue unit arrives on scene, what radio channel do they usually ask you to switch to after establishing contact?

✅ Before You Answer

• Identify which options are for voice communication versus automatic alerts or locating • Recall that Channel 16 is the international calling and distress frequency—how is it used in practice once units are on scene? • Verify which channel (16 or 70) is used for Digital Selective Calling (DSC) rather than normal voice conversations