LRIT and AIS – An analysis of October 2010 data


  1. Lapinski, A.-L.S.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN)
There have been amendments in the recent decade to Chapter V of the 1974 International Convention for the Safety of Life at Sea (SOLAS) which is concerned with Safety of Navigation. One amendment addressed collision avoidance, with the result being the automatic identification system (AIS). Another amendment addressed the identification and tracking of vessels at longer distances, with the result being the long-range identification and tracking (LRIT) system. The two systems have different purposes, but within those purposes they do provide similar information. The goals of this report include a better understanding of LRIT data, an understanding of how AIS and LRIT information complement each other and how combining AIS and LRIT information can improve maritime situational awareness. The AIS position information was found to be offset from the LRIT position information. Identifying vessels that are only broadcasting either AIS or LRIT but should be broadcasting both could be used to enforce AIS and LRIT regulations. It was found that using both systems to achieve situation awareness only offers limited redundancy; however, the two systems do complement each other. In coastal areas where no AIS data are being collected, requesting the LRIT reporting rate be increased could improve maritime situation awareness. Several of the findings documented in this paper corroborate findings made by the LRIT working group.

Il y a un résumé en français ici.

Report Number
DRDC-ATLANTIC-TM-2012-234 — Technical Memorandum
Date of publication
01 Oct 2014
Number of Pages
Electronic Document(PDF)

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