11.   Cleanup crews scoured the seas around Singapore for oil a day after two ships collided in the second accident involving Shell Oil Co. in five weeks.

12.   In one clash last July, a Philippine naval ship collided with and sank a Chinese fishing boat in the South China Sea.

13.   Last Saturday, two mainland-Chinese ships collided due to poor visibility, leaving six seamen dead, two injured and one missing and presumed dead.

14.   Marine authorities have yet to determine which ship collided with the ill-fated boat north of New Zealand before dawn Friday.

15.   On Saturday, the captain of a North Korean freighter went missing after his ship collided with a Japanese tanker and sank off southwestern Japan.

16.   Singapore expected help from Japan and Australia on Saturday to battle oil spilled off its southern coast when two ships collided.

17.   The ship collided with one of the fishing boats, which sank.

18.   The two ships collided Thursday near the eastern Aegean Sea rock cluster known in Greece as Imia.

19.   The two ships collided as the tanker was heading to the Dutch port of Rotterdam.

20.   They said the ship collided with one of the new banks on the canal.