GPSMAP
®
4000/5000 Series Owner’s Manual 45
Almanac, Environmental, and On-boat Data
Conguring a Graph
You can set the scale and duration of the Atmospheric Pressure and Depth graphs. The duration represents the
time interval that appears on the graph, and the scale represents the range of the measured data that appears on
the graph, including specic maximum and minimum values.
1. From the Home screen, select > .
2. Select or .
3. Select .
4. Complete an action:
• Select , and select or to set the duration.
• Select . Select , , or. When you select , the chartplotter sets the optimal
minimum and maximum values for the range, based on environmental conditions. When the
chartplotter receives new data about environmental conditions, it adjusts the scale automatically.
• Select to allow the chartplotter to set the optimal minimum and maximum values for the
range, based on environmental conditions. is only displayed when is already selected
for .
• For Atmospheric Pressure only, select , and select the reference time used to calculate the
barometer trend displayed in the top left corner of the graph.
Wind Speed Data
Selecting Apparent, True, or Ground Wind for the Wind Graph
The chartplotter must be connected to the peripheral devices listed below to capture the data shown on the
wind speed graph.
Wind Speed Description Required Sensors
Apparent Wind Shows wind speed data based on the ow of
air experienced while on a boat in motion�
A wind sensor�
True Wind Shows wind speed data based on the ow of
air experienced while on a stationary boat�
For the most-accurate data, the Wind Speed
Source setting should be set to Auto
(page 52)�
A wind sensor and a water speed sensor; or a
wind sensor and a GPS antenna�
Ground Wind Shows wind speed data based on the ow of
air experienced while on shore�
A wind sensor, a water speed sensor, a
heading sensor, and a GPS antenna; or a
wind sensor and a GPS antenna; or a wind
sensor, a water-speed sensor, and a heading
sensor�
1. From the Home screen, select > > .
2. Select the type of wind speed data included on the graph (, , or
).
Conguring the Wind Speed Sources
You can specify whether the vessel speed data displayed on the compass is based on water speed or GPS
speed. Water speed is the speed reading from a water-speed sensor, and GPS speed is calculated from your
GPS position.
1. From the Home screen, select > > > .
2. Select .
3. Complete an action:
• Select to indicate that the calculated wind speed is based on data from a Water Speed
sensor.
• Select to indicate that the calculated wind speed is based on data from a GPS antenna.
• Select to allow the chartplotter to select a speed data source automatically.
