Eagle Electronics FISHMARK 320 - Manual (Page 66)

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1. Press MENU |
↓ to
O
VERLAY
D
ATA
| ENT .
2. Press
↓ or ↑ to select Data Type|press → or ← to select Data
Size| ENT .
The data will be shown in the new font size. To return to the previ-
ous page, press
EXIT | EXIT .
NOTE:
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.
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 automatically 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 percent, the unit automatically enters HyperScroll mode.