![](/images/new-backgrounds/1228837/228837141x1.webp)
Local Time highlighted on Overlay Data Shown menu (left). The size of
Local Time data has been changed to Large (right).
3.To change the font size for another Data Type, repeat the steps above. To return to the sonar display, press EXIT.
Sonar chart with Overlay Data turned on. This example shows Depth, Water Temperature and the Water Speed of the boat.
Ping Speed & HyperScroll™
Ping Speed controls the rate at which the transmitter and transducer broadcast sonar sound waves — pings — into the water. The unit has a default ping speed of 50 percent. At normal boating speeds, this auto- matically provides enough return echoes to refresh the screen and scroll the chart at maximum chart speed.
However, when you are running at high speeds, or just want the fastest possible screen update, you may want to use the HyperScroll™ feature. When you change the Ping Speed to any setting greater than 50 per- cent, the unit automatically enters HyperScroll mode.
65