Notes
This class includes airborne, shipborne, and submarineborne sonar sets, assemblies, subassemblies, and components designed specifically for use with underwater fire control equipment.

Possible NAICS Codes
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
334419 – Other Electronic Component Manufacturing
333999 – All Other Miscellaneous General Purpose Machinery Manufacturing
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
335313 – Switchgear and Switchboard Apparatus Manufacturing
334512 – Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use
334412 – Bare Printed Circuit Board Manufacturing
334290 – Other Communications Equipment Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing