Introduction to IWRAP
The objective of IWRAP is to provide the user with a tool that assist in quantifying the risks involved with vessel traffic in specific geographical areas. On the basis of a specified traffic intensity and composition the tool allows the user to efficiently evaluate and estimate the annual number of collision and grounding in the specified navigational area.
In order to quantify the grounding and collision risks, rational criteria for prediction and evaluation of grounding and collision accidents have to be developed and the inherent consequences have to be analysed and assessed.
| It should be noted that IWRAP only addresses collision and grounding frequencies, it does not support any analysis of the consequences of these groundings and/or collisions. |
Collision and grounding are among the most common causes for ship disasters. As a consequence there is a growing interest to apply the method of formal safety assessment (FSA) in the shipbuilding and shipping environment to continuously assess and monitor the risk level in a given area.In the summer of 1996 IMO published “Draft Guidelines for Application of Formal Safety Assessment (FSA) to the IMO rule-making process”. The Guidelines for Formal Safety Assessment (FSA) for use in the IMO rule-making process, including amendments, were approved in 2002 (MSC/Circ.1023/MEPC/Circ.392). The high-speed craft rules require risk analysis to be performed and new non-standard tanker designs require detailed oil out-flow analysis. Thus administrations, ship owners, shipyards, consultants, and educational institutions are now facing the situation where they have to apply FSA-methods in ship designs.
At present very limited quantitative data exists for application of risk-based models. Therefore, it is the objective of the present work to develop rational tools for assisting in applying FSA methods.
Using the IWRAP (GRISK) software the frequency of collision or grounding may be evaluated for vessels operating in a specified navigational area.
The main benefit of the formulated procedure is that it allows comparisons of various navigational routes by assessing the relative frequencies of collisions and groundings.
For s deeper understanding of the theoretical background for the IWRAP methodology, please consult the theory part of this Wiki.