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美国国家资料浮标中心（NDBC）制作了两个直径2．3m的沿海浮标样机。尽管这两个浮标水上部分功能相同，但水下部分有实质的区别。第一个浮标使用一个自下支承的配重环圈构造，用一个限制移动摆吊杆系留固定，允许无限制的俯仰角和40°的转动。第二个浮标使用传统的中心导管配重平衡设计。稳定度试验表明，这两个浮标都超过了稳定性要求。目前已正在进行投放试验，以便估算这两种设计对选择的业务环境带来的经济效益。本文介绍其稳定性及早期现场试验的结果。
The U.S. National Data Buoy Center (NDBC) produced two coastal buoy prototypes with a diameter of 2.3 meters. Although the water features of both buoys are functionally identical, there is a substantial difference between the underwater parts. The first buoy uses a self-supporting counterweight ring construction, with a restraining movement of the pendulum suspension tether, allowing unlimited pitch angle and 40 ° rotation. The second buoy uses the traditional center-tube balance weight design. Stability tests showed that both buoys exceeded the stability requirements. Pilot trials are currently under way to estimate the economic benefits of both designs for the chosen business environment. This article describes its stability and the results of early field trials.