marine chronometer meaning in English

航海精密记时计
航海时计
航海天文钟, 船钟
精密航海记时器

The problem was not solved completely until the invention of the marine chronometer in the eighteenth century .
这个问题直到十八世纪发明了航海经线仪才得以解决。
In 1914 , a rolex watch was awarded a class a precision certificate from the british kew observatory , an honor previously reserved exclusively for marine chronometers
1914年,劳力士手表一块被授予甲级证书由英国基尤观测精度,湖州以前专属于海洋计时器