To date, 58 U.S. nuclear submarines have been equipped with Sperry Marine VMS-based navigation systems, and 92 percent of them have been certified to use ECDIS-N as the primary navigation plot.

迄今为止，美国的58艘核潜艇都已配备了斯佩里海事VMS导航系统，其中92％已经获得认证，使用ECDIS-N作为主要的导航图。

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These fossil date indicate that Ningbo Formation is marine-continental transitional sediment, maybe belonging to tidal zone.

这些化石资料表明，宁波组属于一套海陆过渡型沉积，可能为潮间带。

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For instance, sea lilies, marine animals with feathery arms, date back more than 400 million years.

举例来说，有羽状触手的海洋动物海百合，就可追溯到4亿多年前。

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Killgore, 22, was last seen alive Friday night when she left her apartment wearing an evening dress, heading out on a date with 45-year-old Marine Staff Sgt.

CNN: Investigators find body of Marine's missing wife

To date, most research has focused on the impact sound might have on marine mammals, such as whales and dolphins.

BBC: Earth News - 'Noise pollution' threatens fish