In one of the many Soviet definitions of the term, a naval operation (morskayaoperatsiya) was described as a series of naval battles, engagements, and strikes coordinated in terms of objective, place, and time and conducted in an assigned area (zone) of an oceanic or sea theater of military action (TVD in the Russian acronym, theater of operations in Western terms). Naval operations are controlled by a fleet commander. In generic terms, a major naval operation can be understood as a series of related major and minor naval tactical actions conducted by several naval combat arms and combat arms of other services, in terms of time and place, and aimed to accomplish an operational (and sometimes limited strategic) objective in a given maritime theater.
Vego, Milan, "Major Naval Operations" (2008). The Newport Papers. 32.