Marine Traffic & Collision Analyis

Marine traffic can be analysed using Tecnitas DrifTec software, to assess the probability of collision in a given zone. Then a fast yet accurate tool, based on “super-elements” method, can be used to evaluate the consequence of a collision between a ship and another ship, an iceberg or a fixed structure (offshore platform, offshore wind turbine,…).

Tecnitas performs a set of studies, from the collection of data (AIS/own Tecnitas database) concerning the type of Vessel/Vessel positions/roads, to the estimated probability of collision and the associated collision damage for a ship striking another ship, an iceberg or an offshore platform and to determine the most unfavourable collision scenario.

Tecnitas uses several in-house technologies:

-          DrifTec is a collision risk analysis software developed by Tecnitas SAS. It is used to estimate, for a given number of ships navigating on several shipping lanes (routes), the risk of drifting towards a “target” area, as a function of wind, swell, ship type, etc.

 

See Driftec software page.


This Figure presents the approach used for meshing the shipping routes (routes → segments → mesh elements) and the definition of the target area (radius, angular opening). The software computes, for each mesh element, the drifting cone towards the target. The probability of a collision is computed as a function of the probability of  having an adverse wind towards the target which is sufficiently strong for the ship to reach the target before tugs can interfere. To this end, critical wind speeds are computed for each route mesh element and for each ship type (note that drifting coefficients are specific to each type of ship).

-          In order to evaluate collision damage (penetration, deformation energy, breach length), we use, in a first but accurate approach, a specific software based on “super-element” methods that enable to run many simulations in a short time, making it very appropriate for risk analyses.