Chart Datums - Navman Tracker500/500i User Manual

15.0 Chart Datums

GPS derived positions are based on a worldwide reference (datum) known as WGS 1984.
Many charts are based on datums other than WGS 1984. This results in an offset between
a Lat/Lon plotted on the chart and the same Lat/Lon plotted on the Tracker500/500i. To
match the Tracker500/500i with your chart you must enter the datum specified on the chart.
See section 14.0 Setup for details on how to select a chart datum. Once your local datum
has been entered, all latitudes and longitudes, including waypoints, will match the chart.
Note: When using a number of charts with different datums it is important
to ensure that you change the datum to match the chart currently being
used. If the destination waypoint is on a different chart, be sure to
change to that chart's datum before entering the latitude and longitude of
the destination waypoint.
Alternatively, you can manually enter a lat/lon offset value to bring the displayed lat/lon
values in line with the chart you are using. See the Setup screen for details on how to enter
a lat/lon offset. The lat/lon offset function is typically used to match the Tracker500/500i
with older charts where an island may have a large position error, but all points around the
island have the same error.
Tracker Datum name
abbreviation
ADINAN Adindan
AFGOOYE AFGOOYE
AINELABD 70 AIN EL ABD 1970
AMRICN SAMOA American Samoa 1962
ANNA 1 AST65 Anna 1 Astro 1965
ANTIGUA Antigua
ARC 1950 ARC 1950
ARC 1960 ARC 1960
ASCN IS 1958 Ascension Island 1958
ASTRO BCN"E" Astro Beacon E
ASTRODOS71/4 Astro DOS 71/4
ASTR STN1952 Astronomic Station 1952
AUST.GEO1966 Australian Geodetic 1966
AUST.GEO1984 Australian Geodetic 1984
AUST.GEO1984 Ayabelle Lighthouse
BELLEVUE Bellevue (IGN)
BERMUDA 1957 Bermuda 1957
BOGATA Bogota Observatory
CAMPO INCH Campo Inchauspe
CANTON AST66 Canton Island 1966
CAPE CANAV Cape Canaveral
CAPE Cape Province
CARTHAGE Carthage
CHATHAM 1971 Chatham 1971
CHUA ASTRO Chua Astro
Tracker500/500i User Manual
Tanslation of Locality in the datum
table is optional but please do not
translate anything else in the table.
Datum Locality
code
ADI-M Ethiopia, Sudan
AFG Somalia
AIN-A Bahrain Island
AMA American Samoa Islands
ANO Cocos Islands
AIA Leeward Islands
ARF-M Botswana, Lesotho, Malawi, Swaziland, Zaire,
Zambia, Zimbabwe
ARS-M Kenya, Tanzania
ASC Atlantic Ocean
ATF Iwo Jima
SHB St. Helena Island
ASQ Marcus Island
AUA Australia and Tasmania
AUG Australia and Tasmania
PHA Djibouti
IBE Efate & Erromango Islands (Vanuatu)
BER Bermuda Islands
BOO Colombia
CAI Argentina
CAO Phoenix Islands
CAC Florida, Bahamas
CAP South Africa
CGE Tunisia
CHI New Zealand
CHU Paraguay
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