Chapter 2
OPERATIONS
2.15
SETTING TT/AIS
2-120
2.15
SETTING TT/AIS
This section describes the operations of TT and AIS.
2.15.1
COLLISION AVOIDANCE
Problems of Collision Avoidance in Navigation
Marine collision avoidance is one of the problems that have been recognized from of old.
Now, it 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 water, or space. This pattern consists of two closed loops in
principle, one of which is a collision with another mobile craft and the other is a loop of
finding a right and safe way to reach a predeterminate destination.
Fig. 2.15-1 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 the closed loop of
finding a right course on the right side.
Fig. 2.15-1 Navigation Pattern
Destination
Mancuver
Cource and
speed
Course
Ship traveling in controlled condition
Insrument or
judgement
Control
loop
Compass
and log
Caluculati
on
Fixing by radio wave,
visual and celestial
observation
Judgement
Visual and radio
watch
Traffic rule
Cllision
avoidance loop
Vessel
̓
s Spacing loop
Collision avoidance
Decision of cource
Guide loop
Dead
reckoning
Содержание JMA-3300 Series
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