Lowrance AirMap 300 User manual

INSTALLATION AND
OPERATION INSTRUCTIONS
AirMap 300TM

Copyright © 1996, 1997 Lowrance Avionics
All rights reserved.
Lowrance®is a registered trademark of Lowrance Electronics, Inc.
IMS SmartMap™ is a trademark of Lowrance Electronics, Inc.
Jeppesen®is a registered trademark of Jeppesen Sanderson, Inc.
WARNING!
USETHISMAPPINGUNITONLYASANAIDTONAVIGATION.A CARE-
FUL NAVIGATOR NEVER RELIES ON ONLY ONE METHOD TO OB-
TAIN POSITION INFORMATION.
Never use this product while operating a vehicle.
The background map built into this unit is not intended for navigation and
its accuracy has not been verified.This map is derived from U.S.govern-
ment sources which rely on ground and aerial surveys and satellite data.
Since there can be inaccuracies in the data used to create the maps and
in the map’s resolution, plus position inaccuracies in the navigation sys-
tem, use caution when using this product.
CAUTION
Whenshowingnavigationdata toaposition (waypoint),this unitwillshow
the shortest, most direct path to the waypoint.It provides navigation data
tothe waypoint regardlessofobstructions.Therefore,theprudentnaviga-
torwill notonlytakeadvantageof allavailable navigationtools when trav-
elling to a waypoint, but will also visually check to make certain a clear,
safe path to the waypoint is always available.
Thestoragetemperatureforyourunit isfrom -4degreesto +167 degrees
Fahrenheit(-20to +75degreesCelsius).Extended storagetemperatures
higher or lower than specified will cause the liquid crystal display to fail.
Neither this type of failure nor its consequences are covered by the war-
ranty.For more information, consult the factory customer service depart-
ment.
All features and specifications subject to change without notice.
All screens in this manual are simulated. Many were taken with an IMS
SmartMap™ loaded into one of the cartridge slots.

INTRODUCTION .......................................................................................................... 1
INSTALLATION ............................................................................................................. 2
NiMH BATTERY INSTALLATION ................................................................................. 3
ALKALINE BATTERY INSTALLATION ......................................................................... 6
EXTERNAL POWER .................................................................................................... 7
ANTENNA..................................................................................................................... 8
REMOTE ANTENNA MOUNT...................................................................................... 8
MAP CARTRIDGE INSTALLATION ............................................................................. 9
REMOVING MAP CARTRIDGE ................................................................................... 10
YOKE MOUNT .............................................................................................................. 11
KEYBOARD .................................................................................................................. 12
OPERATION ................................................................................................................. 13
TURNING POWER ON ................................................................................................ 13
MENUS ......................................................................................................................... 13
FINDING YOUR POSITION.......................................................................................... 13
COLD START ............................................................................................................... 13
INITIALIZATION ........................................................................................................... 14
ENTER BY MAP........................................................................................................... 14
ENTER MANUALLY...................................................................................................... 16
POSITION/NAVIGATION DISPLAYS ........................................................................... 17
NAVIGATION SCREENS ............................................................................................. 18
CDI INDICATOR ........................................................................................................... 19
MAPPING SCREENS .................................................................................................. 20
AUTOZOOM ................................................................................................................. 22
MAP CURSOR ............................................................................................................. 23
MAP SYMBOLS ........................................................................................................... 24
OBSTRUCTIONS ......................................................................................................... 24
AIRSPACE .................................................................................................................... 26
AIR MAP OPTIONS ..................................................................................................... 27
MAP ORIENTATION ..................................................................................................... 28
EARTH MAP OPTIONS ............................................................................................... 29
C-MAP OPTIONS......................................................................................................... 31
PLOTTER OPTIONS .................................................................................................... 32
ICONS .......................................................................................................................... 34
WINDOWS.................................................................................................................... 36
REPROGRAM WINDOW GROUPS............................................................................. 36
SATELLITE INFORMATION SCREEN......................................................................... 38
DUAL MAPPING........................................................................................................... 40
CLOCK ......................................................................................................................... 40
TIMERS ........................................................................................................................ 42
REPROGRAM BOXES................................................................................................. 43
DATABASES ................................................................................................................. 45
SAVING PRESENT POSITION AS A WAYPOINT (QUICK SAVE)............................. 49
SAVING CURSOR POSITION AS A WAYPOINT........................................................ 50
SAVING PRESENT POSITION AS A WAYPOINT (SELECT WAYPOINT #).............. 50
SAVING CURSOR POSITION AS A WAYPOINT (SELECT WAYPOINT #) ............... 50
EDIT WAYPOINT LAT/LON .......................................................................................... 51
WAYPOINT NAMES ..................................................................................................... 51
WAYPOINT ICONS ...................................................................................................... 52
DELETE A WAYPOINT ................................................................................................ 52
MOVE A WAYPOINT .................................................................................................... 53
DISTANCE BETWEEN WAYPOINTS........................................................................... 53
WAYPOINT OPTIONS.................................................................................................. 54
ROUTES ....................................................................................................................... 54
SELECT WAYPOINTS - WAYPOINT LIST................................................................... 55

SELECT WAYPOINTS - FROM MAP........................................................................... 56
FINISHING THE ROUTE.............................................................................................. 56
FOLLOWING A ROUTE ............................................................................................... 57
DELETE A ROUTE....................................................................................................... 58
NAVIGATION ................................................................................................................ 58
NAVIGATE TO A DATABASE LOCATION .................................................................... 58
NAVIGATE TO CURSOR POSITION ........................................................................... 59
NAVIGATE TO A WAYPOINT USING THE MAP ......................................................... 59
“NEAREST” .................................................................................................................. 60
CANCEL NAVIGATION ................................................................................................ 61
SYSTEM SETUP.......................................................................................................... 61
TRACK HOLDING ........................................................................................................ 61
GPS CORRECTIONS .................................................................................................. 62
DATUM..........................................................................................................................62
PCF (POSITION CORRECTION FACTOR) ................................................................. 63
UNITS OF MEASURE .................................................................................................. 64
POSITION FORMAT .................................................................................................... 64
NMEA/DGPS ................................................................................................................ 65
SERIAL COMMUNICATION SETUP............................................................................ 68
RESET OPTIONS ........................................................................................................ 68
RESET GROUPS ......................................................................................................... 68
SYSTEM INFO ............................................................................................................. 68
NAME INPUT ............................................................................................................... 69
GPS SETUP ................................................................................................................. 69
GPS UPDATE RATE/BATTERY SAVE......................................................................... 70
POSITION PINNING .................................................................................................... 70
EXECUTE GPS SELF-TEST ....................................................................................... 70
EXECUTE GPS COLD START .................................................................................... 71
ALARMS ....................................................................................................................... 72
MESSAGES.................................................................................................................. 73
BACKLIGHT ................................................................................................................. 74
CONTRAST .................................................................................................................. 75
SPEAKER ON/OFF ...................................................................................................... 75
SIMULATOR ................................................................................................................. 75
E6B COMPUTER ......................................................................................................... 77
BATTERIES .................................................................................................................. 79
DEFINITION OF TERMS/ABBREVIATIONS ............................................................... 79
JEPPESEN UPGRADE................................................................................................ 80
WINDOW BOXES......................................................................................................... 81
WINDOW GROUPS ..................................................................................................... 83
UPS RETURN POLICY ................................................................................................ 85
WARRANTY ................................................................................................................. 87
DATABASE LICENSE AGREEMENT........................................................................... 88
DATABASES LIMITED WARRANTY ............................................................................ 89
HOW TO OBTAIN SERVICE - INTERNATIONAL .......................... INSIDE BACK COVER
HOW TO OBTAIN SERVICE - U.S.A. ONLY ................................................BACK COVER

1
INTRODUCTION
Thank you for purchasing a Lowrance Avionics AirMap 300™. With its
large LCD screen, easy to use menus, and outstanding performance, we
think you’ll be happy with your AirMap 300 for many years. No other
handheld GPS receiver on the market today has the AirMap’s combina-
tionof12channelreceiver,Jeppesen®databasewithobstacles(U.S.only),
groundandhydrographic mapping cartridge capability,andprogrammable
screens in a handheld unit.
Like most GPS receivers, your AirMap 300 doesn’t have a compass or
any other navigation aid built into it.It relies solely on the signals from the
satellitesto determineits position.Speed,direction oftravel, and distance
are all calculated from position information. Therefore, in order for it to
determine the direction you’re travelling, you must be moving, and the
faster - the better.This is not to say the unit won’t work at walking speeds
- it will. But the faster you travel, the easier it is for the unit to determine
your direction.
GPS works from satellites that transmit information to the world at very
high frequencies.One disadvantage to this frequency is that it’s “line-of-
sight”. In other words, the signals don’t bounce around like your local
radio or television. If you don’t have a clear view of the sky, or if you’re
inside a metal building, the unit probably won’t be able to pick up the
signals from the satellites.This is common among all GPS receivers. We
have found that using this product inside an aircraft is usually sufficiently
close to the windows and windshield that it works well. However, the in-
cluded remote antenna bracket and cable (model PA-2) lets you mount
the removable antenna on top of the dash, in case it’s required.
Another factor that influences the GPS’position and navigation capabili-
ties is called selective availability or SA.This is small errors purposefully
injected into the transmitted signal from the satellites. The government
does this to degrade the system’s accuracy to civilian and foreign users.
Evenwith SA,GPS is themost accurate navigationsystem everinvented
on such a large scale. The Government’s accuracy specification is 100
meters horizontally and 150 meters vertically 95% of the time. In other
words, the position shown on your AirMap 300 could be up to 100 meters
inanydirectionfrom youractual position, andthealtitude couldbe plusor
minus 150 meters from what’s shown on the screen, 95% of the time.
One way around the S/A problem is to purchase a DGPS receiver and
connect it to your AirMap 300.A DGPS receiver (commonly called a bea-
conreceiver),picksup correctionsignals broadcastfrom ground stations.

2
INSTALLATION
The AirMap 300 operates from six AA batteries or from 6 to 35 volts DC.
The cigarette lighter adapter included with your unit plugs into virtually
anyaircraft’selectricalsystem.The AirMap300 automaticallyswitchesto
external power when it’s plugged into the unit (provided that the external
power has a higher voltage than the batteries.) If, for any reason, the
external power fails, theunit willautomaticallyswitch to thebatteries.The
AirMap 300 does not require batteries when external power is in use,
however they make a good backup in case of power failure. A recharge-
able battery pack, (included with the AirMap 300) has a nickle-metal hy-
dride battery and charger built into a pack that’s almost identical to the
alkaline battery pack that slides onto the bottom of the AirMap 300.
An external antenna kit supplied with the unit allows the removable an-
tenna to be mounted on a suction cup bracket up to four feet away from
the GPS receiver.
SUCTION CUP
AND BRACKET
NiMH BATTERY
The AirMap 300 takes these corrections and applies them to the position
and altitude screens, giving you much better accuracy.Even with S/A on,
and without a DGPS receiver, your AirMap 300 gives you outstanding
positionand navigation information.
Pleasesit down with theunitand thismanual and familiarizeyourselfwith
them before using this unit in the “real world”.A simulator is built in, which
lets you practice with the receiver.

3
Nickel-Metal Hydride (NiMH) Battery Instructions
Your NiMH battery and charger are combined into a housing that slides onto the
hand-held GPS receiver, exactly like the AA battery pack that came with your
receiver. Unlike a nickel-cadmium (ni-cad) battery, a NiMH battery doesn't "re-
member" a certain charge level.You can charge the battery any time you like
without fear of reducing its charge capacity.It can even be recharged while you're
using the GPS receiver!
READ THIS FIRST!
Safety Precautions!
1. Do not short circuit the battery by connecting the metal terminals on
top of the battery. Make certain to always attach the battery cover to
the battery when it's not in use.This will prevent coins, paper clips, or
other metal objects from shorting the battery contacts.
2. Never attempt to disassemble the battery.There are no user service-
able parts inside.
3. Do not expose this battery to fire or high temperatures.If it is exposed
to high temperatures or fire, it can explode, leak, release toxic materi-
als, or catch fire.
General Information
1.The battery may need to be charged and discharged several times at first (or
after long periods of storage) to achieve its highest capacity.To discharge the
battery, attach it to the GPS receiver and turn the receiver on.Leave it until the
receiver shuts itself off.Do not use any other method to discharge the battery!
2. When charging the battery for the first time, the charge indicator may show a
full charge after only ten to fifteen minutes.This is normal. Discharge the bat-
tery as described in step one, then recharge it.
3. It's normal for the battery to get warm during the charging process.
4. The battery will lose its charge over a long period of time in storage. It's best
to fully charge a battery before storing it. Do not store it with power applied to
the charger. Store it at room temperature and in a dry location.

4
OPERATION
To charge your NiMH battery, first slide the protective cover off the top. KEEP
THE BATTERY COVER!You will need it when the NiMH battery is not in use.
BATTERY
COVER
Next, slide the old battery pack off of your GPS receiver and slide the NiMH
battery pack on, as shown below.
Plug the AC adapter or cigarette lighter adapter cable into the battery's jack - not
the GPS unit! If you use the GPS unit's external power jack, the battery will not
charge.
BATTERY'S EXTERNAL
POWER JACK

5
CHARGING
When power is applied to the NiMH battery, the charge indicator light on the front
of the battery shows the charge status.The status light indications are:
Continuous Light .......... Fast Charge
Slow Flashing Light...... Slow Charge
Fast Flashing Light....... Battery is Fully Charged
Charge the battery until the light shows it is fully charged, then run the GPS
receiver off of the battery until it shuts off.If this lasts only a short time, repeat the
process.This conditions the battery and optimizes its performance.
Remember, you can use the GPS receiver while the battery is charging, although
the GPS receiver doesn't have to be turned on in order to charge the battery.
Using the GPS receiver marginally increase the battery's charge time.
If you remove the battery from the GPS receiver, make certain to slide the bat-
tery cover onto the battery.
SPECIFICATIONS
The battery's input voltage should not exceed 28 volts DC, nor be lower than 12
volts DC.
For best performance, charge the battery at room temperature.Store the battery
at room temperature, also.
Operating temperature:
Discharge ............... -4°F to +122°F
Charge ................... +32°F to +113°F

6
ALKALINE BATTERY INSTALLATION
The AirMap 300 requires six AA batteries.We recommend DURACELL®
alkalinebatteries,butother brandswill work.You can uselithium batteries
which will last longer than alkaline batteries (but cost more) or recharge-
ableni-cad batteries (won’t last aslong asstandardalkalines).Recharge-
able alkaline batteries such as RayOVac®Renewals®will also work .
Do not use heavy-duty batteries or any battery other than the ones listed
above. Do not mix different types of batteries. (For example, don’t use
both alkaline and ni-cad batteries at the same time.)
To install the batteries, first turn the AirMap 300 so that it is facing you.
Now grasp the bottom part of the case and push it to the right until it
comes completely off the unit.The
bottom part of the case holds the
batteries. Next, push the battery
holder out the bottom of the battery
cover as shown below. Install each
battery with the negative end (-)
against the spring.The positive end
(+) of each battery should be firmly
againstthe metal plate.When allsix
batteries areinstalled, slidethe bat-
tery holder into the battery cover.
Ifthebatteryholderstickswhenslid-
ing into the battery cover, apply a
thin film of petroleum jelly to the“O”
rings on the battery holder.

7
IMPORTANT!
There are arrows molded into the bottom of the battery cover and battery
holder.Make certain the arrows are properly aligned! Otherwise, the bat-
tery holder won’t slide all the way into the cover and the battery pack
won’t slide onto the unit.
Slide the battery pack onto the unit and the AirMap 300 is ready for use.
EXTERNAL POWER
Insteadof batteries, the AirMap300 canoperateon 6to 35voltsDC from
an external power source. To use external power, an adapter cable is
suppliedwith your unitthat willplug intoyour vehicle’scigarette lighter.To
usethis cable,simply plug oneendinto theAirMap 300andthe otherend
intothe cigarettelighter.A rubberplug issupplied withyourAirMap 300to
cover the external power jack on the side of the unit when it’s not in use.
Youcan leavethe batterypackon when usingexternal power,no damage
to the batteries or the unit will occur. However, if you remove the battery
pack from the AirMap 300, we recommend that the battery contact cover
be placed onto the battery pack as shown below. This will prevent the
battery pack contacts from shorting against metal objects.
A separate cover is provided for the bottom of the AirMap 300.

8
Remote Antenna Mount
Theremoteantennakit lets youmountthe
AirMap'santennauptofour feetaway.The
suctioncup mountcan beinstalled on vir-
tually any flat surface.
Firstpress thesuction cupinto the holein
the bottom of the bracket. Next, remove
theantennafrom the AirMap 300andslide
the suction cup bracket over the antenna
asshownatright.Press the antenna cable
ANTENNA
Your AirMap 300 has a removable antenna that folds over the display
when the unit is not in use.This prevents damage to the display.To open
theantenna, simplylift onan edgeand raise itto thedesiredposition.The
antennais aquickrelease design,simplifying itsremovaland installation.
To remove the antenna, push the antenna to the right (1), while simulta-
neously moving the antenna up (2), until it clears the AirMap's right side
(3). To replace the antenna, reverse the above steps. Make certain to
align the antenna with the AirMap 300 until the antenna slides into place
to the left by itself.When it does, the antenna has mated with the connec-
tor inside the unit and it’s ready for use.
1. 2. 3.

9
MAP CARTRIDGE INSTALLATION
TheAirMap 300 uses Jeppesen®,IMS Smart-
Map™ and WorldMap™, and C-Map™ car-
tridges,allofwhicharepackagedinacartridge
housing specifically designed for Lowrance
mapping products.
The IMS SmartMap™ cartridges contain digi-
tized data of over 120,000 bodies of water.
Nearly allinland waterways-publicandprivate
lakes, rivers,and streams, pluscoastal United
States waters up to 25 miles out are included.
There are also state and U.S.interstate high-
ways androutes,cities andtowns.Theseinlandmapping cartridges cover
the entire continental United States in 64 highly detailed cartridges.The
WorldMap™ cartridges cover all other areas of the world, showing more
detail than the background map, but not as much as the SmartMap™
areas.
LEI IMS
TEXAS
NORTH
AMERICAS
DATABASE
LEI IMS
AMERICAS
DATABASE
AMERICA’S
DATABASE
over the suction cup bracket and onto the an-
tenna.This locks the bracket onto the bracket
with a friction fit. Press the other end of the
cable firmly onto the AirMap's left antenna
mountingbracket.Moistenthe suctioncupand
press it onto any clean, smooth surface.The
unit is now ready for use.

10
To install a cartridge into the AirMap 300, first make certain the unit is
turned off. Never install or remove a cartridge with the unit turned
on!You can damage your unit if you install or remove a cartridge with the
unit turned on.Next, pry the cover off the back of the unit.Place the car-
tridge into either slot with it’s label facing you as shown at the bottom of
the previous page. Now slide the cartridge towards the top until it stops.
Replace the cover.
TheC-Mapcartridgescovermostoftheworldwithdetailedviewsofcoastal
and some inland waters.Over 600 cartridges are available.
TheJeppesen® database cartridgecontains thelocation ofVOR’s,NDB’s,
intersections, and airports.It also has airport information such as runway
length and widths, frequencies, fuel availablity, and more. These car-
tridges can be updated every 28 days. See page 80 for Jeppesen data-
base update information.
REMOVING A CARTRIDGE
If you have difficulty removing a cartridge, use the back cover as a re-
moval tool. Simply press one side of the cover against the ridge on the
cartridge and gently push towards the bottom of the unit. Don’t use a
corner of the cover - it could damage it.
IMPORTANT!
Ifyouunplug theJeppesen cartridge andturn the AirMap300on, orif you
swap your Jeppesen cartridge for a newer one, all routes are erased! No
waypoints will be erased - only routes. Make certain to write down any
stored routes before swapping cartridges.

11
YOKE MOUNTING
Included with your AirMap 300 is a yoke mounting bracket. It secures to
the yoke’s shaft with a clamp. Follow the instructions included with the
yoke mount to assemble and attach it to your aircraft. The AirMap 300
attaches to the yoke mount with hook and loop material which is already
attached to the back of your unit. Simply press the AirMap 300 onto the
hook and loop material that’s on the yoke mount.
Make certain to push the antenna back as far as it will go.It needs to be
as parallel to the ground as possible in order to receive signals from the
satellites.See the drawings below for a typical installation.
When the AirMap 300 is attached to the yoke mounting bracket, it can
operate from batteries or the external power cord. To use the external
power cord, simply plug one end into the power connector on the right
sideoftheAirMap 300 andtheotherend into theaircraft’scigarettelighter.

12
KEYBOARD
The keyboard has twelve keys. The arrow keys are tied to most of the
features, letting you easily move the mapping cursor, navigate through
the menus, make selections from menus, and other tasks.
TheWPT key lets you create, save, and recall waypoints and routes.The
PAGES keyswitchestheunit between thethree major displays:windows,
navigation, and mapping.To select different features, or to modify func-
tions,presstheMENU key.TheZ-OUTandZ-INkeyszoom-outandzoom-
inyourviewon themapping screen.TheENT andEXIT keyslet you enter
or erase selections.The ENT key works the same as the right arrow key
for selecting features.In other words, you can use the ENT key instead of
the right arrow key to select a menu or enter data.The PWR key turns
both the AirMap 300 and its lights on and off.
Note:To prevent an accidental power shutdown, you must hold the PWR
key down for a few seconds in order to turn the unit off.
PAGES
MENU
Z-OUT Z-IN ENT PWR
EXIT
WPT

13
OPERATION
Turning Power On
To turn the AirMap 300 on, simply press
the PWR key. A screen similar to the one
atright appears.The databasecartridge’s
name and expiration date appears at the
bottom of this screen.Press the EXIT key
to erase it. A warning message appears
next, press the EXIT key to erase it, also.
MENUS
Most of the adjustments and features are
found on“menus”.PressingtheMENUkey
lets you view the menus.Different menus
items are added or subtracted to the ba-
sic list, depending on which mode (map-
ping, navigation, or windows) the unit is
in.This givesyouthefeatures that arespe-
cific to the mode you are in, but also has
items that are used on all modes.
Toerasethe mainmenu, simply pressthe
EXIT key.
FindingYour Position
Cold Start
When it’s turned on for the very first time, the GPS receiver doesn’t know
where it is, nor what the local time or date is. If you tell it your position,
time, and date, the unit will take less time to lock-on to the satellites and
give you a fix or position.
However, if you don’t want to push buttons at this time, that’s fine. The
AirMap300 willlockonto thesatellites andgiveyoua positionwithoutany
input from you.This is called a “cold-start”.It simply means that the unit is
searching without your help for the satellites that are in orbit.A cold-start
can take up to 5 minutes to acquire enough satellite data to determine
your position, although it typically takes less time than that.
Oncethe GPSreceiverlocks on tothe satellites andfindsyourposition,it
stores the satellite data in its memory.The next time you use the unit, it
should take less time to lock on.

14
Once the AirMap 300 locks on to the satellites and finds your position, it
stores the satellite data in its memory.The next time you use the unit, it
should take much less time to lock on.
To use your AirMap 300, first take it outside, away from hangers and
buildings.You need a clear view of the sky.
Open the antenna and adjust it so that it is parallel with the ground.Press
the PWR key. Read the message on the screen, then press the EXIT key
to erase the message.A screen similar to the one at right appears.
This is Map 3.Your present position is shown
as a cross surrounded by a diamond. As you
wait for the AirMap 300 to find your position,
you’llseenumbersflashingonthedisplay.Any-
time you see flashing numbers, it means the
AirMap 300 does not have a position! Do not
relyon anydatathatisflashing!When thenum-
bers stop flashing, the unit has locked on to
the satellites and the position is good.
That’sallyouhave todo to findyourposition.The timedisplay maynot be
correct when the cold start method is used.See the manual initialization
section for details on changing the time.
FindingYour Position
Initialization
A cold-start as described above can take up to 5 minutes to find your
position.There is another method to initialize the AirMap 300 that may let
it acquire the satellites faster. Manually entering your position, local time
and date will help the GPS receiver determine which satellites are avail-
able andlockon tothem faster.There aretwoways toinput your position.
You can locate your position on the receiver’s map or enter your latitude
and longitude. Remember, once the receiver finds its position, it stores
the position into memory. The receiver won’t
have to initialized the next time you it on.
Enter by Map
To show the receiver your approximate loca-
tionon itsmap, firstpressthe MENUkey,then
the up or down arrow keys until the “GPS
SETUP”menu ishighlighted as shown at right.
Now press the right arrow key. The screen
shown at the top of the next page appears.

15
Using the down arrow key, highlight the “Ini-
tialize GPS Receiver” menu, then press the
right arrow key. The screen shown below ap-
pears next.
Thisis theGPS initialization screen.The posi-
tion, altitude, time, and date the GPS receiver
iscurrently using tofind thesatellitesis shown
at the bottom of this screen. Changing these
valuestoyourlocalpositionandtimewillspeed
the position lock.
Tochangetheposition,highlightthe“EDITLAT/
LON label, then press the right arrow key. A
screensimilarto theone at rightappears.With
the “INPUT FROM MAP” label highlighted,
press the right arrow key. The screen below
appears.
The mapping screen appears with two lines
thatintersect atthe center.These linesarethe
cursor.Using the arrow keys, move the cursor
to your present position.You can use the Z-IN
and Z-OUT keys to zoom in or out to find your
area on the map. Once you have the cursor
close to your location, simply press the ENT
key.The unitreturns to theGPSSETUP menu
with your local latitude and longitude showing
in the box at the bottom of the screen.

16
Enter Manually
To change the position by manually entering
thelatitudeandlongitude,presstheMENUkey,
then highlight the “GPS SETUP” label and
press the right arrow key. Now press right ar-
row key again while the “EDIT LAT/LON” box
is highlighted. The screen shown at right ap-
pears.Highlight the“INPUTMANUALLY”label
and press the right arrow key. The screen
shown below appears.
Ifyourlatitudeis south,press the upor downarrowkey tochangeit.If itis
north,pressthe rightarrowkey tohighlight thefirst number inthelatitude.
Now press the up arrow key to increase the
number or the down arrow key to decrease it.
Once the first number in the latitude is set,
press the right arrow key once to move to the
next number in the latitude.
Keep pressing thearrowkeysuntilthe latitude
and longitude are set to your local position.
(Note:This position does not have to be very
accurate.If you can get it within one degree of
your actual position, that will be fine.) When it’s set, press the ENT key.
The AirMap 300 accepts your entry and returns to the GPS setup menu.
Now change the local time and date if they’re incorrect on this screen by
highlighting the appropriate label and pressing the right arrow key.(Don’t
worry about altitude.)When everything is acceptable, press the EXIT key
toreturnto amode screen.The AirMap300 willinstantly usethedata you
entered to find the satellites in the sky. (The
unit knows which satellites will be available at
theposition,date,andtimeyouentered.There-
fore, it will only look for those satellites, mak-
ing the search time much shorter than a cold
start which looks for all of the satellites until it
finds three.)
Once the AirMap 300 finds and locks on to
three satellites, it stops flashing the numbers
on the display.(Note:Altitude will still flash un-
til the unit locks on to the fourth satellite. It takes four satellites to deter-
minealtitude.)