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Table 1. Device actions in response to setting changes
Chart datum
Magnetic
variation
Result
ARC 1950 (Africa)
22°E
Turn on and off transmission of periodic messages with
a 4-bit value (0..15, binary 0000..1111), reset to 0 after 15.
This setting increases the value. See note 1.
Bermuda 1957
20°E
Increase NMEA 2000 data instance value (0..252), reset to 0 after
252. Factory setting is 0. To decrease the value, reset all settings
to factory values first and then increase the data instance.
Bogota Observatory
(Colombia)
21°E
Increase NMEA 2000 system instance value (0..15), reset
to 0 after 15. Factory setting is 0.
Campo Inchauspe
(Argentina)
23°E
Increase NMEA 2000 device instance value (0..255), reset
to 0 after 255. Factory setting is 0. To decrease value, reset
all settings to factory values first and then increase it.
European 1950
(Mean, European
Datum)
29°E
Reset all settings to factory values.
Guam 1963
(Pacific Ocean)
24°E
Switches transmitted type of measured data to inside (cabin, saloon)
air temperature and humidity.
Hjorsey 1955 (Ireland)
25°E
Switches transmitted type of measured data to outside
(the boat) air temperature and humidity. This is the factory setting.
Liberia 1964 (Africa)
27°E
Turn on and off transmission of humidity, air temperature
and dew point temperature with 3-bit value (0..7,
binary 000..111), reset to 0 after 7. This setting increases
the value.See note 2.
