External Alarm Speaker / Buzzer; Acknowledging Alarms; Interception Arriva; Off Track - Raymarine LIGHTHOUSE 3 Advanced Operation Instructions

• Interception arrival — If enabled, during target interception an alarm is triggered when your vessel
reaches the distance specified in Arrival radius.
• Off track — If enabled, during active navigation an alarm is triggered when your vessel steers off
track by more than the specified Cross track error value.
• Anchor drift — If enabled, an Alarm is triggered when your vessel drifts from your anchor position
by more than the specified Drift range.
• Low fuel remaining — If enabled, an alarm is triggered when the fuel remaining in your fuel tanks
reaches the specified Fuel level.
Note: The Fuel manager must be enabled for alarms to be triggered.
• LightHouse chart obstructions, If enabled, an alarm in triggered when an obstruction is detected.
For details refer to: p.161 — Obstruction alarm (LightHouse charts)
• DSC alarms — If enabled, an alarm is triggered when DSC distress calls are received.
• AIS safety messages — If enabled, an alarm is triggered when AIS safety messages are received.
• MOB data type — Determines whether the MOB waypoint is fixed at the Position the alarm was
triggered, or advances its position based on tide and wind effects (Dead reckoning).
• Fishing range — If enabled, an alarm is triggered when your Depth reading reaches the depth
specified in Shallow water arrival or Deep water arrival.
• Water temperature alarm — If enabled, an alarm is triggered when the water temperature reading
reaches the temperature specified in Lower temp limit or Upper temp limit.
• Digital switching alarms — When your system includes Digital switching a list of all configured
Digital switching alarms will be displayed.
• AX8 camera messages — If enabled, messages from a connected AX8 camera will be presented
as alarms on your MFD.
• Engine alarms — If enabled, alarms will be triggered when engine warning alarms are received
from connected, compatible engine management systems or interfaces.
• Home button active alarm indicator — If enabled, when an alarm is active the onscreen Home
icon is colored Red and contains a warning triangle.

External alarm speaker / buzzer

If your MFD has a built-in buzzer or is connected to a wired external buzzer then MFD alarms will
trigger an audible tone. If you connect your MFD to a Bluetooth speaker then the alarm tone can also
be heard from the speaker as well.
When connected to a Bluetooth speaker a separate volume control is available to control the volume
of MFD Alarms sounded through the speaker. Please refer to the

Acknowledging alarms

Follow the steps below to acknowledge an active alarm.
With an alarms notification displayed onscreen:
1. Select OK.
The notification is dismissed and the audible tone is stopped.
An acknowledged alarm remains active until the conditions that triggered the alarm are no longer
present.
Note:
If an alarm notification includes an Edit button, selecting it will display the relevant setting in the
Alarms menu so that, if required, you can change the alarm threshold.
80
Bluetooth speaker pairing details.