Raymarine ST4000 Plus, Owner'S Handbook Manual

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Chapter 5: Customising the ST4000 Plus
37
Compass deviation correction (SWING COMPASS)
The compass deviation correction option allows you to correct the
compass for deviating magentic fields. The procedure must be
performed as the first item in your initial sea trial, and is described in
detail in
Chapter 7, Post Installation Procedures .
Deviation display (DEVIATION)
This screen shows the current deviation value, calculated from the
correction procedure (Swing Compass). You cannot edit this value.
Heading alignment (HDG ALIGN)
The heading alignment screen shows the current reported heading.
Note:
Always check compass alignment after compass deviation
correction (see ìPost Installation Proceduresî). However, once the
initial correction procedure has been carried out, make any alignment
adjustments as often as you wish, without re-correcting your compass.
ï Steer your vessel onto a known heading and check the heading.
ï If required, adjust the heading value to match the known value, using
the
-1
,
+1
,
-10
and
+10
keys.
Heading mode (HDG)
Select either magnetic or true heading mode. When heading data is
displayed in normal operation, the screen indicates whether true or
magnetic mode has been selected.
Bar selection (RUDD BAR)
Select the type of bar graph that is shown at the bottom of the displays.
The options are as follows:
RUDD BAR: This shows the rudder position. Note that a rudder
reference transducer is required for accurateWheel Pilot rudder
position information.
STEER BAR: This is the default setting. The bar graph is used as
follows: