What does the term "secondary search" entail?

The term "secondary search" refers to a thorough search of a building that occurs after a primary search has been conducted. The primary search focuses on quickly locating and rescuing any potential victims, usually under challenging and immediate conditions. Once this initial search is completed, the secondary search is undertaken to ensure that no victims have been overlooked and to assess the area more carefully for any hazards or additional individuals needing assistance.

During the secondary search, firefighters will systematically check areas that may not have been thoroughly examined during the initial quick search. This process often involves a more methodical approach, including using tools like thermal imaging cameras and ensuring that all compartments and spaces within the structure are checked.

The other options reflect different operations or tasks that are not associated with the specific definition of a secondary search. A quick search for lost equipment, a preliminary assessment before extinguishing a fire, and securing a perimeter all serve different purposes in fireground operations and do not align with the detailed follow-up search that characterizes a secondary search.