EasyManuals Logo

JRC JMA-5208HS User Manual

JRC JMA-5208HS
540 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #253 background imageLoading...
Page #253 background image
5.1 PREPARATION
ņ4
5
yy
yyy
Basic Concept of Collision Avoidance
There are two aspects in collision avoidance: collision prediction and avoidance. Collision prediction is to
predict that two or more vessels will happen to occupy the same point at the same time, while collision
avoidance is to maneuver vessels not to occupy the same point at the same time.
In practical operation of vessels, a spot of collision has to be deemed to be a single point but a closed zone. This
closed zone is conceptually defined as a CPA (Closest Point of Approach). In collision prediction, the time to be
taken until a ship reaches the CPA is defined as a TCPA (Time to CPA).
Fig. 5-2 shows a diagram caked “Collision Triangle”.
Own
ship
CPA
TCPATime to CPA
Target
vessel
CPA ring
Relative vector
Collision triangle
Fig. 5-2 Collision Triangle

Table of Contents

Other manuals for JRC JMA-5208HS

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the JRC JMA-5208HS and is the answer not in the manual?

JRC JMA-5208HS Specifications

General IconGeneral
BrandJRC
ModelJMA-5208HS
CategoryMarine Radar
LanguageEnglish

Related product manuals