Raymarine LIGHTHOUSE 3, Advanced Operation Instructions

Page: 152 / 450

Dangerous targets alarm
Use the Dangerous targets alarm to notify you if a Radar target or AIS target will reach a specified
distance from your vessel within a specified time.
The Dangerous targets alarm settings can be accessed from the Collision Avoidance menu: Menu >
Targets > Collision Avoidance .
To set up the Dangerous targets alarm, adjust the Safe distance to the desired value and then select
a Time to reach safe distance . The alarm will be triggered if a tracked target will reach the specified
Safe distance from your vessel within the time period selected.
You can enable and disable the targets that will trigger the alarm using the Radar targets and AIS
targets toggle switch. When disabled the targets will not trigger the Dangerous targets alarm.
You can display a Safe distance ring around your vessel in the Chart app by enabling the Show
safe distance toggle switch.
Predicted areas of danger
The Predicted areas of danger feature tracks Radar targets and AIS targets in relation to your own
vessel’s Course Over Ground (COG) and Speed Over Ground (SOG).
If your paths are predicted to cross a Interception line is displayed from your vessel and the target.
Additionally, Interception zones are displayed to indicate where there is an increased risk of collision.
The Interception line and the Interception zones are based on your current course and speed and
the target’s current course and speed and can help you determine whether you should change
course and / or speed to avoid a potential collision.
The graphics automatically refresh when the MFD receives new position data from the target.
Important:
The Collision Avoidance feature is a graphical aid only, provided to help increase user awareness
of the potential for collision. It is vital to have a good understanding of the
International Regulations
for Preventing Collisions at Sea (IRPCS / COLREGS), to ensure all actions taken are in accordance
with the IRPCS. Important concepts to understand in relation to Collision Avoidance include (but
are not limited to): Risk assessment; Right of Way; Restricted visibility; interpreting lights and
shapes; interpreting sound and light signals. In the event of conflict, the IRPCS regulations must
take precedence. For more information on IRPCS / COLREGS, refer to:
IRPCS
152