🔍 Key Concepts

• Search and Rescue Transponder (SART) purpose and how it alerts rescuers and survivors • What kind of signal a SART responds to (think X-band radar) and what happens when that signal is detected • Difference between internal status alerts (battery, mode) and alerts related to nearby rescuing units

💭 Think About

• Ask yourself: When would an audible tone be MOST useful to survivors – when something changes inside the unit, or when there is a change in the outside search situation? • Think about what event the SART is designed to react to: is it digital selective calling (DSC), radar from searching vessels, or its own battery level? • Which option best matches the core function of a SART: making survivors aware of possible rescuers nearby, or informing them of equipment housekeeping details?

✅ Before You Answer

• Verify what kind of equipment actually uses DSC (Digital Selective Calling) – is that a function of a SART or of radios like VHF/MF/HF? • Check standard SART operation: the unit remains in standby and then responds when it detects X-band radar from a searching ship or aircraft; what alert would survivors need at that moment? • Confirm whether SART manuals typically mention audible tones for battery condition or rescue-related activity.