The tool also records shipping activity and ship speeds.

该工具还记录运输活动和船速。

One international project has been launched to listen to the sounds of the sea to study how the reduced shipping activity has affected sea life.

一个研究来自海洋的声音的国际项目已经启动了，以研究减少的航运活动对海洋生物有怎样的影响。