Humminbird 728 Fishfinder Review

Fish finder is a device to detect objects like fish and rocks under water. It creates an image on the display screen of everything it finds at the set distance below water. It uses sonar echo sounding technology to identify the object and convert it to visual images. The sonar unit has a transducer. The transducer converts electric energy from the transmitter to sound wave. The frequency of this sound wave is higher than audible range. This sound wave generated by the transducer travels through water. It bounces back to the sonar unit after hitting the object. This is the basic technology of sonar echo sounding system. Read more…