According to the liquid crystal data display for the depth sounder shown in the illustration, what is the instantaneous depth currently being displayed? EL-0186 Illustration EL-0186: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option D — 47.5 meters below the transducer

Depth sounders typically measure vertical distance downward from the acoustic transducer face installed on the hull bottom. The display metric corresponds directly to depth below the transducer, omitting the vertical offset distance between the transducer installation point and the actual waterline surface.