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COLLISION
AVOIDANCE
Problems
of GollisionAvoidance
in
Navigation'
' ' ' ' ' '
Marine collision avoidance
is
one of the
problems
that have been recognized
from
of
old. Now, il will
be
described
briefly who the collision
avoidance
is
positioned
among
the
navigational aid
problems.
The navigation
pattern
of all mobile craft constitutes a system
with some closed
loops
regardless of
the media through
which
the
mobile craft travels,
whether
air, water, the
boundary between air
and
with another mobile
craft
and the
other is
a
loop
of funding a
right
and safe
way to
reach a
predestinate
destination.
Fi9.1.19 shows
the conceptual diagram of
navigation
pattern
by MR.E.W.Anderson.
The
closed
loop of collision
avoidance is shown
on the
left side
and closed
loop
of
finding a right
course
on the right side.
Maring
Accidgnts and Gollisiolls"
..
"
r
r r r r
" " "'
r
"
Among marine
accidents, collision accidents have
been highlighted as the tonnages
and speed of ships
become
higher
along
with
the increase
in traffic
at sea.
lf
a
tanker
carrying dangerous
articles
such
as crude oil collides
with
any other vessel, then
not
only the vessels
involved
with the accident but other
vessels
in the vicinity,
port
facilities,
inhabitants in
the
coasial
area as
well
as marine
resources
may
also
suffer
immeasurable damages
and lroubles.
Collision accidents
have
a high
percentage
of the
marine accidents
that
have occuned in recent
years.
To
cope
with
these
problems,
any
effective
measures are
needed
and some equipment
to achieve
collision avoidance
requirements have
been
developed at rapid strides.
Ship
traveling in
controlled
condition
Fig,1.1 9 Navigation Pattern
1-27
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