One is in the air and there are a number of helicopters that have been off searching for people.

一架在空中，还有许多直升机在搜寻人员。

Lifesavers were equipped with a small device under a search helicopter where pigeons would search the surrounding area for the red and yellow life jackets — the most saturated colors to detect in the open sea.

救生员在搜索直升机下方配备了一个小型装置，鸽子可以在搜索直升机周围搜索红色和黄色救生衣——这是在公海中检测到的最饱和的颜色。