FLIR RAYMARINE A75 WiFi - Example Scenario 2 - Target Vessel Moving Faster than Your Vessel

Scenario 1 Speed change examples
1. Speeding up
(1)
— Increasing vessel speed to
pass ahead of the target vessel. Proceed with
caution, there is always an inherent risk when
passing in front of other vessels.
2. No speed change — Not changing speed or
course is not an option as it can result in a
collision.
3. Slowing down — Slowing down a sufcient
amount will allow the target vessel to pass safely
ahead of your vessel.
4. Slowing down
(2)
— Slowing down a sufcient
amount will allow the target vessel to pass safely
ahead of your vessel.
Note:
•
(1)
In this example the paths will still cross within
the Intercept distance, so the graphics are still
displayed.
•
(2)
In this example the paths will no longer cross
within the Intercept distance, so the graphics
are not displayed.
Example scenario 2 — Target vessel
moving faster than your vessel
Note: These scenarios are examples provided for
guidance only.
In certain situations, when the target vessel is
travelling faster than your vessel, there may be more
than one opportunity for your paths to cross within
the Intercept distance. If this is the case then a
second Interception zone is displayed.
1. 1
st
— The rst Interception zone (displayed
closest to the target vessel) represents a
bow-to-bow collision.
2. 2
nd
— The second Interception zone (displayed
farthest from the target vessel) represents the
target vessel running you down from behind.
When altering course and speed, both Interception
zones must be avoided.
Scenario 2 Course change examples
1. Course alteration to pass ahead of the
Interception zone. As the target vessel is moving
faster than your vessel you will pass astern of
the target.
2. Course alteration to pass ahead of the rst
Interception zone. Although this course
alteration is sufcient to avoid a potential
bow-to-bow collision, it has created a second
Interception zone where the target may now run
you down from behind.
3. Course alteration to pass between the 2
Interception zones. Although this may seem like
the quickest option, proceed with caution, as
the gap between the 2 Interception zones can
close quickly, especially when your vessel slows
down.
4. Course alteration to clear astern of the target
vessel and its Interception zone. This would be
the preferred manoeuvre as it correctly alters
your vessel’s course so that it is clear of the
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