Furuno FEA-2107 Operator's Manual page 347

The figure below shows the source of water speed is used for drift calculation.
Manual
SPEED
Not selected
(Water track of
dual-axis doppler
log OR pi lot log)
Not selected
or no value
°
59 31.206'N
°
024 36.731'E
WGS 84
DGPS
HDG 070.0°
SPD 1.8
(CALC)
Kt
SB 1.7
(POSN) Kt
COG 045.1°
(POSN)
SOG (POSN) 2.0
Kt
Drift used by the system is shown in the Other page of the Sensors dialog box. In the example below, set and drift
have been entered manually since the Manual box is checked. Other text which may appear to show source of set
and drift are
"(log)": Log or dual axis log
"(posit)": Position sensor
"(filter)": Kalman filter
"(man)": Manual entry.
SOG/COG used by the system
Speed (water speed) used by the system
Heading used by the system
Selected
LOG
RADAR
(measures
water speed)
Not selected
or no value
Manual
DRIFT
Not selected
Selected and value exists
Selected and value exists
SOG, if available
from any of
selected position
receiver
Not available
Selected
used by
the system
Calculator
19. Navigation Sensors
Speed
used by
the system
(water
speed)
Available
Alarm 2001
No Speed
Available
Posn
Drift
19-11