Flasher type fish sonar

A flasher type fish sonar comprises:

• a timing form portion for outputting timing signals,
• a transmitting portion for outputting transmitting signals in accordance with the timing signals from the timing form portion,
• an ultrasonic transducer for emitting ultrasonic waves in the sea in accordance with the transmitting signals from the transmitting portion,
• a receiving portion for amplifying reflected signals from the ultrasonic transducer,
• an A/D converter for converting the amplified reflected signals from the receiving portion to digital signals,
• a first buffer memory for storing once reflected signals from the A/D converter,
• a sea bottom detecting portion for detecting the sea bottom by the reflected signals from the first buffer memory,
• a display data forming portion for converting to display data the reflected signals from the sea bottom detecting portion,
• a second buffer memory for storing the display signals from the display data forming portion,
• a display letter data memory for inputting display letter data to the display data forming portion,
• a display signal transmitting portion for transmitting the reflected signals from the first buffer memory and the display signals from the second buffer memory,
• a fish sonar displaying portion mounted near an edge of a rotary disk rotated by a motor, and
• a letter display portion including a plurality of light emitting diodes mounted near a center of the rotary disk,
• wherein fish sonar are displayed by the fish sonar displaying portion, and the letter data are displayed by the letter display portion.