🔍 Key Concepts

• Difference between depth value and the reference point (surface vs. transducer) on a sounder display • How the display screen usually labels what the number represents, such as BELOW TRANSDUCER or BELOW SURFACE • Reading the numeric depth separately from the text explanation right under or beside it

💭 Think About

• What is the large numeric value shown on the display, and what are the units indicated at the bottom? • Exactly what words are printed right next to or under that number explaining what it is measured below? • If the display already tells you what the depth is measured from, do you also need to infer anything from the range scale on the right side?

✅ Before You Answer

• Verify the exact wording underneath the number (e.g., BELOW TRANSDUCER or BELOW SURFACE). • Confirm that the units shown at the bottom are meters, not feet or fathoms. • Make sure you do not confuse the range scale on the right with the instantaneous depth reading in large digits.