MIL-STD-167-2A is a United States military standard titled: "Vibration, Shock, and Noise (Shipboard Equipment) – Part 2: Vibration (Except Rolling and Pitching)."
It specifically covers the vibration environmental requirements for shipboard machinery, equipment, and systems on surface ships and submarines. The "2A" revision is the current active version, superseding the original MIL-STD-167-2. mil-std-167-2a pdf
Many professionals confuse the two versions. While both cover vibration, MIL-STD-167-1 focuses on the vibration generated by the equipment itself (emissions). In contrast, MIL-STD-167-2A governs how equipment withstands vibration coming from the ship’s environment (immunity). Specifically, Type I of MIL-STD-167-2A addresses the low-frequency, high-amplitude vibration typical of ship hulls and propulsion systems. MIL-STD-167-2A is a United States military standard titled:
The U.S. Department of Defense’s ASSIST (Acquisition Streamlining and Standardization Information System) website is the official repository. A direct search for "MIL-STD-167-2A" will yield a downloadable PDF free of charge, but note that access may require a CAC card or registration for contractors. While both cover vibration, MIL-STD-167-1 focuses on the