While active, this customizable “quest” can be used to identify the locations of one or more of your companions. To do so, use a “Vault-Tec Population Management System” (found in the Workshop’s Power > Miscellaneous submenu) to specify one or more target companions; objective markers are then added to your Pip-Boy’s map and compass display. These markers will remain in place until the related objectives are changed or cancelled at any population management system.