They logged up the ship's position regularly.

他们定时把船的方位记入航海日志.

《简明英汉词典》

The captain determines the latitude and longitude of his ship's position.

船长测定船位置的经纬度.

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While at sea the officer should keep a proper lookout and check ship's position at times.

航行中,驾驶员应保持正规了望,并经常核对船位.

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