Ancient Mariner Consultancy was seeking support in undertaking a marine traffic risk assessment for a feasibility study on future developments in one of the remote Islands within Hong Kong waters. The proposed developments included a range of marine facilities like ferry pier and moorings for pleasure vessels along the waterfront of the development.
NASH Maritime was asked to quantify the change in collision, allision and grounding probability, as a result of the proposed development.
The assessment was conducted using the International Association of Lighthouse Authority (IALA) Waterway Risk Assessment Program (IWRAP Mk II), an internationally recognised quantitative risk modelling tool for navigation risk.
What we did
To understand the change in navigation risk we compared the current use of the area with future expected use with the addition of the proposed facilities.
To set up the base case scenario, we collated and processed AIS data into an IWRAP-ready format.
In addition to a year’s worth of AIS data, visual observations were used to identify the passages of non-AIS traffic, such as small recreational craft. This data was integrated with the AIS data.
We then setup the IWRAP model of the study area, developing the existing infrastructure and bathymetry and defining vessel way points. Using the AIS data, we calculated risk of collision, allision and grounding.
Next, we developed the future case, adding in the proposed infrastructure, amending vessel legs and waypoints before recalculating risk scores, providing actionable intelligence on the change in risk to develop appropriate mitigation measures.
The findings of our work were submitted to the client in a technical report.
The report would subsequently be shared with relevant competent authorities/organisations for the Consultancy Study of the remote Island.
NASH Maritime are recognised international experts of IWRAP and have contributed to its development.