为了在移动对象数据库(Moving Object Database,MOD)中更好地存储和记录移动对象(船舶)的航行信息,对船舶进行位置管理,结合船舶航行信息的特点,建立船舶航线的数据模型,制定船舶位置更新策略；利用运动矢量,处理船舶航行过程中的状态更新；在保证精度的情况下,以较小的通信代价持续跟踪船舶的状态信息,并能够查询船舶历史轨迹、实时监测和预测船舶的航行.实验证明,该航行信息更新机制能够保证航行信息精确度、减少通信代价.%In order to store and record the navigational information of moving objects (ships) in Moving Object Database (MOD) and to manage the location of the ships, a data model of the ship route is designed and the ship location update strategy is established based on the characteristics of navigational information. The motion vectors are used to process the status update during the ship' s navigation. The update mechanism can track the status information of ships successively at a comparatively low communication cost under the condition of ensuring precision, and the history query, real-time monitoring and prediction of ship's navigation are realized. The experiment shows that the navigational information update mechanism can ensure the precision of the navigational information and reduce the communication cost.
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