Furuno FMD-3200 Operator's Manual page 211

Reference SPD: If checked, radar is used as the source for speed and course. (Not
available with the System Sensor Settings.)
Set and drift (not available with system sensor): Check the [Set Drift] checkbox to
manually set speed and course of drift. Note that you can select manual drift only if
you deactivate the AIS function.
Angle = Difference between heading and COG
Spd = Speed component of the drift vector
Cse = Course component of the drift vector
Vector defined by (SOG and COG) is equal to vector sum of vectors defined by (SPD
and HDG) and (set and drift).
SOG
COG
POSN (Position) page
The sensor label (here GPS001) indicates the name of the sensor. A status indication,
Prim or Second, denotes the priority of the sensor. Latitude and longitude values will
appear in red for position sensor error. Position sensors have priority, which is indicat-
ed as Prim or Second Only one sensor can be primary while the others can be sec-
ondary or off. If a position sensor is changed from secondary to primary state and
another position sensor was chosen as primary, then that sensor previously selected
to primary state is then automatically selected to secondary state. When the position
source is changed based on priorities and signal validity to another position source,
then you get the Alert 471"Position Source Change".
North
cse
HDG
spd
SPD
SPD: water speed
HDG heading of ship
SOG: speed over ground
COG: course over ground
spd: speed of drift
cse: course of drift
angle: difference between HDG and COG
17. NAVIGATION SENSORS
17-3