Lowrance lms-522c igps 操作指南

78 

screen, and Overlay Data changes only the information floating on 

the screen without a box. See Customize Page Displays, on page 86, 

for information on customizing data boxes. 

1. From the Map or Sonar page, press 

|

↓ to 

|

. 

2. Press 

↓ or ↑ to select Data Type, then use ← → to scroll through the 

five overlay options: Off, Small, Medium, Large and Enormous.  
3. Select the desired setting. The selected data type will be displayed in 

the new size. To change the font size for another Data Type, repeat 

Steps 2 and 3. Press 

 to return to the sonar display.  

Some data types can be displayed in only one font size. If that is the 

case, the Data Size box will not be displayed for that data type. 

™ 

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. 
These faster ping rates allow you to maintain a high-detail picture on 

the screen, and the screen refresh rate and chart scroll speed can keep 

pace with the boat as it moves quickly over the bottom terrain. 
When using HyperScroll, you may also need to manually decrease the 

sensitivity for optimum performance. Depending on water depth and 

other conditions, HyperScroll may cause a second bottom echo to return 

to the transducer during the next ping cycle, or sounding. This can result 

in a large amount of clutter appearing on the screen. If this occurs, just 

decrease the sensitivity to a level that eliminates the clutter. When you 

turn HyperScroll off, you can return to your original sensitivity level.