🔍 Key Concepts

• VHF-DSC radios are designed for marine communication and distress calling • Typical front-panel controls on a standard VHF-DSC set • What R.I.T. (Receiver Incremental Tuning) is usually associated with

💭 Think About

• Think about which control is common on many types of radios (not just marine VHF) versus those that are specific to marine distress and routine calling • Ask yourself: Which of these buttons or knobs would you expect to see on the front of a modern fixed‑mount marine VHF-DSC radio on a small boat? • Consider what types of adjustments a simple channelized VHF marine radio actually allows the user to make to the received signal

✅ Before You Answer

• Be clear on what DSC (Digital Selective Calling) adds to a normal VHF radio (distress, individual calls, group calls, etc.) • Visualize a real VHF-DSC set and mentally locate: Distress, channel selection, squelch, and menu/softkeys • Ask: Which option in the list relates more to fine-tuning frequency (used on SSB or ham radios) rather than to a fixed-channel marine VHF?