4
Astro and DC 40 Owner’s Manual
Customizing Your Device
Data Field
Description
Speed - Overall
Avg.
Your average speed
since last reset.
Sunrise
The time of sunrise
based on your GPS
position.
Sunset
The time of sunset
based on your GPS
position.
Temperature
- Water
The temperature of
the water. Requires a
connection to a NMEA
0183 temperature-
capable device to
acquire data.
Time of Day
The current time of
day based on your
time settings (format,
time zone, and daylight
saving time).
Time to
Destination
The estimated time
needed to reach your
final destination.
Time to Next
The estimated time
needed until you reach
the next point on the
route.
Data Field
Description
To Course
The direction in which
you must move to
return to the route.
Trip Odometer
A running tally of the
distance traveled since
the last reset.
Trip Time - Moving A running tally of time
since the last reset.
Trip Time
- Stopped
The time spent not
moving since the last
reset.
Trip Time - Total
A running tally of
distance traveled since
the last reset.
Turn
The angle of difference
(in degrees) between
the bearing to your
destination and your
current course. L
means turn left. R
means turn right.
Velocity Made
Good
The speed at which
you are closing on a
destination along a
route.