Raymarine LIGHTHOUSE 3, Advanced Operation Instructions

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The Home icon will turn Red and have an exclamation mark placed inside it.
The Homescreen Alarms icon will display the number of active alarms.
Alarm settings
Depending on connected peripheral hardware and MFD configuration the alarms listed below can be
enabled and disabled and where applicable alarm thresholds can be set or changed.
Note:
Alarms are only triggered when relevant hardware (e.g.: sensors) is connected and reporting the
data required for the alarm.
• Dangerous Radar targets — If enabled, an alarm is triggered when Radar targets become
dangerous. Radar targets are deemed dangerous when they have the potential to
cross your path within a specified distance and time. For alarm parameters refer to:
p.280 — Dangerous targets alarm
• Lost Radar targets — If enabled, an alarm is triggered when dangerous Radar targets become lost
(i.e.: no Radar return from the target has been received for 20 seconds).
• Dangerous AIS targets — If enabled, an alarm is triggered when AIS targets become dangerous.
AIS targets are deemed dangerous when they have the potential to cross your path within a
specified distance and time. For alarm parameters refer to:
p.152 — Dangerous targets alarm
• Guard zone 1 — If enabled, an alarm is triggered when Radar returns are detected within guard
zone 1.
• Guard zone 2 — If enabled, an alarm is triggered when Radar returns are detected within guard
zone 2.
• Waypoint arrival — If enabled, when you arrive at a waypoint, an alarm is triggered. This setting
allows you to specify a radius size for three types of arrival alarm. When your vessel crosses the
specified radius, the Waypoint Arrival alarm is triggered. The following Waypoint arrival alarms are
available:
– Arrival radius — Used when the MFD is NOT in pilot integration mode and the Autopilot is
in Track mode.
– Pilot track mode radius — Used when the MFD is integrated with an Autopilot and the Autopilot
is in Track mode.
– Search route arrival radius — Used when the MFD is following a SAR pattern. Also helpful when
race sailing and using Laylines, or when fishing, as this alarm setting provides a smaller radius to
ensure you don't get alerted too far away from the target waypoint.
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