Position Discrepancy Alert; Source Of Sog, Cog, Speed, Heading, Rot, Drift And Docking Speed Components - Furuno FEA-2807 Operator's Manual

19.5

Position Discrepancy Alert

You can activate the alert "407 Position discrepancy"
from the Initial Settings dialog box. The alert is active
between primary position and any secondary positions.
Note that the alert is also effective between your ship's
position and any positions, since ECDIS compass
position discrepancy between position used by system
(your ship's position) and any individual position sensor
selected as primary or secondary source of position. To
deactivate the alert set limit as 0.00.
19.6 Source of SOG, COG, Speed, Heading, ROT,
Drift and Docking Speed Components
The figure below shows how various sources of navigation data are selected. "SOG, COG" is speed over ground and
course over ground, respectively. "Speed" is speed over water, "Drift" is the difference between speed over water
and speed over ground. Docking speed components are bow speed (transversal), stern speed (transversal) and center
speed (longitudinal).
Heading used by the system is shown at the upper right corner of the ECDIS display. In the example shown below,
heading is received from a gyrocompass and it is shown without additional text, meaning the value is referenced to
true North. Additional gyro-related text that may appear are "(mag)" if the value is referenced to magnetic North,
"(man)" if the value has been manually entered; or "(corr)", which is displayed in orange, if the value includes gyro
correction.
Note: Magnetic heading cannot be used with he Track Control System.
Manual
COURSE
Not selected
Not selected
or no value
°
HDG 071.0
SPD (WT) 15.6 kn
SB (POSN) 0.0 kn
°
COG (POSN) 071.0
SOG (POSN) 15.6 kn
59°31.206'N
024°36.731'E
WGS 84
DGPS
ROT used by the system is shown in the SPD/CRS page of the Sensors dialog box. The Rate Gyro field shows the
text "(calc.)" when the system calculates ROT from movement of heading. No text is shown when the value is
received from an ROT gyro.
GYRO 1
GYRO 2
Not selected
or no value
NM
Selected
Selected and value exists
Selected and value exists
GYRO from
RADAR
Not available
19. Navigation Sensors
Heading
used by
the system
Available
Alarm 402
No Course
Available
19-7