“locator”可以造什么句，locator造句

Reconnaissance of the area as the first step, the locator, using available topographic maps and sometimes an airplane, explores the area.

Unlike the guys in the raft, we had an emergency locator beacon so the Coast Guard could find us.

You could hear the chirping of the locator devices the fire fighters wear, hear the whistle of the respirators, see only the lights flashing red and yellow through the haze.