Chapter 3: Calibration
23
3
Cal
ibrat
io
n
•
press the
ALIGN TO COG
soft key: the
HEADING
value will then be
aligned to the
COG
(course over ground) heading received from
the GPS and you will see the following pop-up message
•
expect some difference between COG and the heading when the
boat turns
Note:
If you press
ALIGN TO COG
when the SOG is less than 3 knots you
will see the warning message:
SOG TOO LOW. CANNOT ALIGN TO COG
.
Increase the boat’s speed then press
ALIGN TO COG
again.
3. Because many factors (such as tides and leeway affecting the boat)
can make the actual heading differ from
COG
, you may then need to
fine-tune the heading alignment (see below).
Fine-tune the alignment
1. Use the
ADJUST HEADING
soft keys to adjust the displayed heading so
it matches the boat’s steering compass or a known transit bearing.
2. Save the aligned heading by pressing the
ENTER
or
CLEAR
key to
return to the
COMPASS SETUP
menu.
Note:
If you do not want to save the new aligned heading, press
CANCEL
ALIGNMENT
to return to the
COMPASS SETUP
menu and restore the
previous heading value.
3. Then press
ENTER
or
CLEAR
key twice to return to normal operation.
HEADING ALIGNED TO COG.
USE ADJUST HEADING KEYS
TO FINE TUNE HEADING
D5959-1
ADJUST
HEADING
ALIGN
TO COG
CANCEL
ALIGNMENT
D5958-1
Heading on
Pathfinder Plus
Steering compass
Known
heading
D5960-1
HEADING
155°M
81198_1.book Page 23 Monday, February 11, 2002 8:36 AM
