Simrad HS52 Instruction Manual page 45

INSTALLATION
• An external compass reading like from a gyro compass.
• Two fixed points on the chart that the vessel is sailing
between.
The observation period for the heading difference should
continue for an as long as possible period in order to eliminate
errors in the HS52 measurements caused by multipath effects.
These may be particularly pronounced in the static conditions of
a harbor area.
The average value for observations from each of the two
different systems should then be used, and the offset between
the two systems (reference value minus HS52 reading) input as
the Head offset value.
The offset value can be either positive or negative.
Example:
If the heading measured by the reference system is 32.1º and the
Simrad HS52 heading 28.5 degrees during the calibration
period, 3.6 (32.1 - 28.5) should be entered in the Expert setup
submenu as the Head offset value.
Alarm Sound
Used for turning the alarm sound on and off, see Alarms on
page 49 for details. The sound, if enabled, will be present as
long as the alarm condition is present, and the alarm is not
acknowledged. If the alarm switch is connected to an external
alarm panel we recommend that the internal alarm sound is
disabled. The default setting is OFF and the product will then be
according to IMO THD and GPS Receiver Equipment approval.
Pos Alarm
Used for to enable or disable the the position alarm. The
following selections are available:
• ON-R. Position alarm enabled when position gets reduced.
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