Skip to main navigation menu Skip to main content Skip to site footer

Articles

No. 23 (2020)

Benefits of Assessing Risk in Maritime Navigation Using IALA and LINZ Methods

Submitted
October 19, 2022
Published
2020-05-30

Abstract

Introduction of the Automatic Identification System (AIS) for shipping has led to
use of archived data in risk assessment for maritime navigation. The IWRAP
software from the International Association of Aids to Navigation and Lighthouse
Authorities (IALA) makes use of statistics derived from AIS data to determine
likelihood of collision and grounding events in waterways where maritime traffic
follows regular routes. Alternatively, the New Zealand Hydrographic Authority
implemented a weighted overlay in a Geographic Information System (GIS) using
AIS data together with further geographical information of a waterway to determine
risk. These methods are tested in Trinidadian waters of the Gulf of Paria to identify
benefits. It is concluded that each method offers a different contribution to the
decision making process for improvement to the safety of navigation.