着重阐述了利用数字选择性呼叫技术的船舶跟踪系统的组成结构及其工作原理、技术指标；
Next, the structure, the working principles and the performance of the DSC Ship Tracking System which has been developed by the author is mainly described.
(甚高频数字选择性呼叫)作为近海海域的一种主要报警方式，对于船舶航行安全有着很重要的作用。
VHP DSC (very High Frequency Digital Selective Call), as a main means of alarm, is very important for the vessels to navigate safely.
(甚高频数字选择性呼叫)作为近海海域的一种主要报警方式，对于船舶航行安全有着很重要的作用。
VHP DSC (very High Frequency Digital Selective Call), as a main means of alarm, is very important for the vessels to navigate safely.
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