Test Case Head-On Collision

Introduction

This page describes one of a series of selected Test Cases which have been analysed/verified by use of the IWRAP program and by hand calculation. Only the number of collision candidates is calculated.

This test case calculates the number of Head-On collisions per year.

The Scenario

To calculate this scenario with the IWRAP tool, do the following steps:

• Define leg;
• define traffic distribution in each direction;
• define causation factors;
• define number of ships in each direction;
• run the job and read results.

Note that we here use 10000 crude oil tankers in the length interval 200-225m.

From this length interval and ship type IWRAP looks up the breadth and speed using the predefined dimension tables described Here.

Hand calculation of the Head-On Collision Senario

This result is equal to the result calculated by IWRAP.

See also Test Case Overtaking Collision

Source: IWRAP Mk II, Basic Modelling Principles for Prediction of Collision and Grounding Frequencies, (draft working document), Rev. 4, 2008.03.09, Peter Friis-Hansen, Technical University of Denmark.