104 GPSMAP 188/188C Sounder Owner’s Manual
APPENDIX > NAVIGATION TERMS
Navigation Terms
Avg Speed—the average of all second-by-second speed readings
since last reset.
Bearing (BRG)—the compass direction from your current location
to a destination.
Course—the course between the active from and to waypoints.
Depth—the depth below transducer. This field is active only if a
transducer is connected to the GPSMAP 188/188C Sounder.
Distance (Dist)—the distance from the current location to a
destination.
Dist to Destination—the distance from the current location to a Go
To destination, or the final waypoint in a route.
Dist to Next—the distance from current location to a Go To
destination, or the next waypoint in a route.
DOP (Dilution of Precision)—reflects the quality of the GPS
signals and satellite geometry.
Elevation—height above mean sea level (MSL).
ETA (Estimate Time of Arrival)
—The time you estimate to reach
your destination waypoint, based on current speed and track.
ETA at Destination—the time you estimate to reach a Go To
destination or the final waypoint in a route.
ETA at Next—the time you estimate to reach a Go To destination
or the next waypoint in a route.
Fuel—the fuel required to travel from current location to the
indicated route waypoint.
GPS Accuracy
—estimated accuracy of the GPS position.
Leg Dist—the distance between two route waypoints.
Leg Fuel—the fuel required to travel from a route waypoint to the
next waypoint (in sequence) in the route.
Leg Time
—the time required to travel from a route waypoint to the
next waypoint (in sequence) in the route.
Max Speed—the maximum second-by-second speed recorded
since last reset.
Moving Average Speed
—average speed while the unit is moving.
Moving Trip Timer
—total time the unit has been moving.
Odometer—a running tally of distance travelled, based on the
distance between second-by-second position readings.
Off Course—the distance you are off course in either direction,
left or right.
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