Raymarine LIGHTHOUSE 4, Operation Instructions Manual

Page: 346 / 504

Bearing and variation
Menu item/description Options
[Bearing mode]
Determines how bearing and
heading data is displayed.
• True
• Magnetic
[System Datum]
Determines the datum used by your
display. This should be set to the
same datum used by your paper
charts.
List of available datums.
[Variation]
When set to [Auto] the display will
automatically compensate for the
naturally-occurring offset of the
Earth’s magnetic field.
• Auto
• Manual
[Manual variation]
When [Variation] is set to [Manual] ,
you can specify an offset.
30° W to 30° E
Time differentials
Time differentials are used for Loran positioning.
Measurement
Units
[Chain] List of available Loran ‘master’
chains.
[Slave 1]
Cannot be set to the same as Slave
2
Filtered list of slave stations based
on selected chain..
[Slave 2]
Cannot be set to the same as Slave 1
Filtered list of slave stations based
on selected chain..
Measurement Units
[ASF 1]
Additional Secondary Factors
-9.9 to +9.9
[ASF 2]
Additional Secondary Factors
-9.9 to +9.9
Advanced settings menu
The advanced settings menu allows you to specify some advanced settings
for engine dials and wind data response times.
1. [Maximum RPM] — Select to specify a maximum RPM for your engine
dials, or allow the system to automatically configure the Maximum RPM.
2. [Custom RPM red zone] — Enable toggle to allow selection of a custom
red zone for engine RPM dials.
3. Custom RPM red zone field — With [Custom RPM red zone] enabled you
can specify the RPM at which the red zone begins.
4. [Wind angle response] — Select to change the rate at which wind angle
data is updated. The setting can be adjusted from 1 to 15. The higher the
value the faster the update rate.
5. [Wind speed response] — Select to change the rate at which wind speed
data is updated. The setting can be adjusted from 1 to 15. The higher the
value the faster the update rate.
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