Why is the Soviet system called Osa or Wasp, and how does that name relate to its other designations?
Short answerOsa means Wasp; Osa-M identifies the naval version, while project, army, and Western reporting systems add other labels for the design family.
NotesOsa is rendered as Wasp, but that translation is only one naming layer. The naval Osa-M designation distinguishes the shipboard version from the army's ground-based Osa system, while project and Western reporting names add further labels. A source may therefore discuss the same design family under different names. The service variant and naming system should be checked before two labels are treated as interchangeable.