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Northstar M121/M84 Installation and Operation Manual 9
2 Basic Operation
Overview of the M121 keys
q
ESC
– Go back to an earlier menu or window. In
chart mode centers chart at boat’s position.
w
DISPLAY
– This is a powerful key that allows you
to setup the display the way you want. Main
displays can be saved as favorite displays for easy
access from the
key.
e
MENU
– Show a menu of the options for the
current active window.
r
ENTER
– Start an action or accept a change.
t / – Changes the range on a window eg. Chart
or Sonar zooms
y , , , – Cursor keys, to move the cursor or
the selection highlight.
u – The key selects which window you
are working with. The Active window is indicated
with a red border.
i – The key allows you to quickly
switch between your saved favorite displays.
o
GOTO
AUTO
– For a navigation display: Start navigating
to a point, waypoint or along a route (see section
3-1-2). For sonar display: Select a sonar operating
mode (see section 6).
a
SETUP
– The setup key takes you to the setup
menu which allows advanced configuration of
the M121.
s – This key places a waypoint on the Active
Chart Window.
d – Man overboard (MOB, see section 2-4).
f – Turn Instrument on and off (see section 2-2);
adjust the backlighting (see section 2-3).
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