FLIR RAYMARINE A75 WiFi - Target Interception Pre-Requisites; Target Interception Graphics; Example Scenario 1 - Own Vessel Moving Faster than the Target Vessel

Warning: Collision Avoidance
and the IRPCS
The Collision Avoidance feature is a
graphical aid provided to help increase
user awareness of the potential for
collision. It is important to have a
good understanding of the International
Regulations for Preventing Collisions at
Sea (IRPCS), so that all actions taken are
in accordance with the IRPCS.
In the event of conict the IRPCS
regulations must take precedence.
Target interception pre-requisites
Target interception graphics are displayed in the
Chart application when:
• the AIS overlay is enabled
• your own vessel’s SOG is greater than 2.0 Kts.
• target vessel’s SOG is greater than 2.0 Kts.
(Under 2.0 Kts the target’s interception zone is
displayed as a circle around the target.)
• Target Interceptions are turned On and the target’s
Course Over Ground (COG) will cross your own
COG within the specied Intercept distance, or
• An individual intercept has been initiated using the
context menu. Target interception graphics will be
displayed regardless of whether your paths will
cross.
Target interception graphics
1. Intercept distance — When Target interceptions
is turned on, target interception graphics are
displayed for targets whose COG could cross
your own within the Intercept distance specied
on the Target interceptions page.
2. Interception zone — The Interception zone
provides a suggested clearance area around
the target’s projected location. This enables you
to plot your course safely around any potential
collision areas.
3. Intercept point — The Intercept point is only
displayed when an individual target interception
has been initiated from the context menu.
Note: When trying to rendez-vous with a target
this is the point to aim for.
4. Target’s COG line — Target’s COG.
5. Target — This is the last reported position of
the target.
6. Own vessel’s COG line
7. Own vessel
Example scenario 1 — Own vessel
moving faster than the target vessel
Note: These scenarios are examples provided for
guidance only.
In the example above the vessel’s COG will cross
with the target’s COG within the Interception zone,
which could cause a collision. You should alter
course and / or speed to avoid the potential collision.
Scenario 1 Course change examples
1. Course alteration to pass ahead of the
Interception zone — Proceed with caution,
there is always an inherent risk when passing in
front of other vessels.
2. Course alteration to pass ahead of the target
vessel — This manoeuvre is not recommended
as your vessel will still cross through the target’s
Interception zone.
3. Course alteration to pass astern of the target
vessel and its Interception zone — This
manoeuvre alters your vessel’s course so that
it does not come into contact with the target’s
Interception zone and passes astern of the
target.
4. Course alteration to pass clear astern of the
target vessel and its Interception zone. This is
the preferred manoeuvre as it correctly alters
your vessel’s course so that it is clear of the
target’s Interception zone and passes safely
astern of the target. This manoeuvre also
clearly shows the target vessel of your change
of course.
AIS (Automatic Identication System)
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