What is the distance recorded by the fathometer below the waterline?

The fathometer, or depth sounder, measures the distance from the waterline to the seabed by transmitting sound waves and calculating the time it takes for them to return after bouncing off the ocean floor. In this scenario, an accurate reading of 9.5 feet indicates that the fathometer registered this specific depth based on the sound wave's travel time.

Understanding this is essential for navigation and safety in maritime operations, particularly for determining water depth in relation to the vessel's draft and ensuring safe passage in varying conditions. The other depth measurements do not match the reading provided by the fathometer, making 9.5 feet the confirmed distance recorded below the waterline.