19. Navigation Sensors
19-4
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Set and Drift: See the description below.
Wind: Wind (True or North) speed (kn or m/s) and direction are displayed. Note that
true wind is wind relative to your ship heading. For further details, see section 19.11
"Wind Sensor".
Depth below trans: Depth from hull at bow and aft to bottom. A depth alert value
may be entered to alert you to shallow depth.
Temperature: Water surface temperature.
Water current: Tide at current position.
AIS targets:Status of AIS data. Check Danger & Lost Alms to get alert for
dangerous or lost target.
Set and drift: Check the Manual box to manually set speed and course of drift. Note
that you can select manual drift only if there are no automatic sources for SOG and
COG. In other words, you have neither a dual-axis log nor any position receiver
available.
Angle = Difference between heading and COG
Spd = Speed component of the drift vector
Crs = 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).
HDG
spd
SOG
COG
a
ngle
crs
SPD: water speed
HDG: heading of ship
SOG: speed over ground
COG: course over ground
spd: speed of drift
crs: course of drift
angle: difference between HDG and COG
North
SPD
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