1International Maritime Organization. Commendation of Per- formance Standards for an Universal Shipborne Automatic Identification System (AIS) [ S] . London : IMO, 1997 : 13- 16.
2LIN C C, DONG F, LE J, et al. AIS System and the Ap- plications at the Harbor Traffic Management [ C ]//Wire- less Communications, Networking and Mobile Computing, 2008. Dalian : Communication and Network,2008 : 1-3.