Dictionary Search Results Search for: Leave blank to see all terms (creates a very large page; please be patient). Options: Search only within terms. Exact matches only. Highlight hits in red. For a selection of basic naval terms, see the log and report glossary. Results: sa4 SA4abbreviation: USNR officer designation for Special Service, Lighter-than-Air Pilot. Formerly S(A4) and A-VG.