🔍 Key Concepts

• Fathometer basic principle: how depth is measured using sound waves (echo sounding) • Difference between creating sound waves and processing electrical signals • Role of a transducer in converting one form of energy to another

💭 Think About

• Which device in the list actually changes electrical energy into mechanical vibrations in the water? • Think about what sits in the hull or over the side and sends sound pulses into the water—what is that called? • Which components mainly handle signals and power (electronic), and which one directly interacts with the water?

✅ Before You Answer

• Identify which option is specifically designed to convert electrical signals into sound waves in water • Eliminate components that primarily amplify or process signals rather than generate vibrations in the medium • Recall common fish-finder or depth sounder setups and the name of the hull-mounted unit that sends and receives echoes