Lowrance electronic M56 GPS Receiver User Manual


 
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4. ARROW KEYS – These keys are used to navigate through the
menus, make menu selections, move the plotter cursor and sonar chart
cursor and enter data.
5. ENT (Enter) – This key allows you to save data, accept values or
execute menu commands. It is also used to create event marker icons.
6. EXIT – The Exit key lets you return to the previous screen, clear
data or erase a menu.
7. WPT – (Waypoint) The Waypoint key is used to save and recall way-
points, search for waypoints and access the waypoint list. It's also in-
volved in some navigation functions.
8. ZOUT – (Zoom Out) – This key lets you zoom the screen out. On the
Sonar Page, this key returns you to a full sonar chart display, showing
the entire water column from surface to bottom. On the Plotter Page,
this lets you see a larger geographic area on the display. Less detail is
seen as you zoom out.
9. ZIN – (Zoom In) – This key lets you zoom the screen in. On the Sonar
Page, this key enlarges fish signals and bottom detail. On the Plotter
Page, zooming in lets you see greater detail in a smaller geographic
area on the display.
Memory
This unit has permanent memory that saves all user settings, even when
power is removed. It does not require, nor does it use an internal backup
battery, so you never have to worry about replacement batteries.
Menus
Your sonar unit will work fine right out of the box with the factory default
settings. You only need to learn a few basic functions to enhance your
viewing. We'll discuss them briefly here, then talk about them and all the
other commands in more detail in Sec. 4, Advanced Sonar Operation.
Sonar Mode has two primary menus that control its operation.
They are the Main Menu and the Sonar Menu.
Main Menu
The Main Menu contains some basic function commands and some setup
option commands. You access the Main Menu by pressing
MENU|MENU.
You run a command by using or to highlight the command and then
pressing
ENT. To clear the Main Menu screen and return to the Page dis-
play, press
EXIT. (Remember, our text style for "MENU|MENU" means
"press the Menu key twice." See a full explanation of our instruction text
formatting on page 8, Instructions = Menu Sequences.)