A more thorough explanation:

The Worldwide Military-Locator Service is a search service that helps locate the current duty station of a member of any branch of the United States military services. This service is especially useful for enforcing the service member's child-support obligations.

Each branch of the armed forces maintains a worldwide locator service that is available to military and nonmilitary persons, their counsel, and Title IV-D agencies. To use the locator service, you need to provide the member's full name and social-security number.

John is a member of the United States Army. He has been deployed to a new duty station, and his ex-wife needs to locate him to enforce child-support payments. She can use the Worldwide Military-Locator Service to find out where John is currently stationed.

Another example is when a family member wants to send a care package to a service member but doesn't know their current location. They can use the locator service to find out where the service member is stationed.

These examples illustrate how the Worldwide Military-Locator Service can be used to locate members of the military for various reasons.