1.   Naturally this started everyone wondering about the amount the boat had sunk, and trying to remember the previous watermarks.

2.   The boat sank in a storm.

3.   The economic tides could rise yet most boats could sink.

4.   When the straw soaks up water, the boats slowly sink into the ocean.

5.   The boat sank under the weight of the cargo.

6.   The boat sank to a depth of several hundred feet.

7.   The boat sank after it was swamped by waves.

8.   A fishing boat has sunk overnight in the north sea.

9.   Boat sinks.

10.   Boats sink.