10 sentences

1. 顷刻间，海上狂风大作。

   qǐng​kè​jiān, hǎi​shàng kuáng​fēng dà​zuò.

   Suddenly, a gale blew up at sea.

   Source: Dong Chinese Dictionary

2. 他在海上工作。

   tā zài hǎi​shàng gōng​zuò.

   He works at sea.

   Source: Dong Chinese Dictionary

3. 海上起了大风。

   hǎi​shàng qǐ le dà fēng.

   A strong wind rose at sea.

   Source: Dong Chinese Dictionary

4. 我们在海上。

   wǒ​men zài hǎi​shàng.

   We're at sea.

   Source: OpenSubtitles

5. 由于海上风浪太大，船只纷纷靠岸。

   yóu​yú hǎi​shàng fēng​làng tài dà, chuán​zhī fēn​fēn kào àn.

   Due to the heavy seas, ships headed for the shore one after another.

   Source: Dong Chinese Dictionary

6. 气象站正在严密监测海上的风情。

   qì​xiàng​zhàn zhèng​zài yán​mì jiān​cè hǎi​shàng de fēng​qíng.

   The weather station is closely monitoring the wind conditions at sea.

   Source: Dong Chinese Dictionary

7. 船员们在海上航行了数月，终于看到了陆地。

   chuán​yuán men zài hǎi​shàng háng​xíng le shù yuè, zhōng​yú kàn​dào le lù​dì.

   After months at sea, the crew finally spotted land.

   Source: Dong Chinese Dictionary

8. 这艘快艇试图在深夜偷渡敌方的海上封锁线。

   zhè sōu kuài​tǐng shì​tú zài shēn​yè tōu​dù dí​fāng de hǎi​shàng fēng​suǒ​xiàn.

   The speedboat tried to run the enemy's naval blockade in the middle of the night.

   Source: Dong Chinese Dictionary

9. 他是一名经验丰富的水手，在海上生活了二十年。

   tā shì yī míng jīng​yàn fēng​fù de shuǐ​shǒu, zài hǎi​shàng shēng​huó le èr​shí nián.

   He is an experienced sailor who has lived at sea for twenty years.

   Source: Dong Chinese Dictionary

10. 他去年被录用，现在在中海油的一座海上平台工作。

    tā qù​nián bèi lù​yòng, xiàn​zài zài zhōng​hǎi​yóu de yī zuò hǎi​shàng píng​tái gōng​zuò.

    He was hired last year and now works on an offshore platform for CNOOC.

    Source: Dong Chinese Dictionary