Messages - Lowrance AirMap 300 Installation And Operation Instructions Manual

The second alarm, "Distance warning" sounds when you are within 10
nautical miles of an airspace in any direction.
The limits on both the "look ahead" and the "dis-
tance warning" alarm are adjustable. To do this,
first select the alarms menu from the main menu.
Next, move the black box to the "Airspace Alarms"
at the bottom of the screen. Press the right arrow
key. The screen shown at right appears.
To adjust an alarm, or turn it on or off, move the
black box to the desired label, then press the right
or left arrow keys. When you have everything on
this page set as desired, press the EXIT key to
erase this menu and return to the ALARMS menu.
When an alarm is triggered, the AirMap 300 flashes
a message on the screen as shown at right. To
view the airspace information, switch to the "Mes-
sages" mode.
Airspace alarms work in the 3D mode. In other words, not only does your
position and track determine when an airspace alarm is triggered, but
also your altitude (displayed on the AirMap 300), plus or minus 500 feet.
For example, if the ceiling of an airspace that you are heading for is 4000
feet and you are travelling at 4500 feet, the airspace alarm will be trig-
gered and a message will be shown on the display, as shown above.

MESSAGES

At the bottom of the Alarms/CDI menu are the po-
sition (POS) and DGPS message selections. The
position message (shown at right) appears for a
few seconds whenever the AirMap 300 locks onto
the satellites and shows a position. It also appears
when the unit loses the lock onto the satellites and
cannot navigate. Pressing the EXIT key erases
these messages.
The DGPS message appears whenever the unit begins or stops using
DGPS data to help determine your position.
To turn on either message, select the "Alarms/CDI" menu from the main
menu, then move the black box to the desired message and press the
right arrow key to turn it on. Press the EXIT key to erase this screen.
73