Which phrase indicates that a primary search has been successfully completed?

The phrase "Primary search is all clear" signifies that a primary search has been successfully completed. This indicates that fire personnel have thoroughly checked the designated area for any victims or hazards and have confirmed that it is safe, meaning no individuals are trapped or in need of rescue within that portion of the structure.

The primary search is crucial as it involves a rapid but systematic examination of the area to locate any victims, while also assessing safety concerns. When personnel announce that the primary search is "all clear," it provides reassurance to command and other team members that this specific area has been adequately checked and deemed secure.

Other phrases may suggest varying levels of search completion or findings, but "all clear" specifically denotes a successful primary search outcome without any indications of people needing assistance.