An outlying landing field (OLF) is an auxiliary airfield, associated with a seaborne component of the United States military. When associated with the United States Navy (who operate the majority), they are known as naval outlying landing fields (NOLFs) or naval auxiliary landing fields (NALFs); when associated with United States Marine Corps, they are known as Marine Corps outlying fields (MCOFs) or Marine Corps auxiliary landing fields (MCALFs).