::Certainly the need for perspective could (and probably should) be satisfied by referring to the article on the warship's class, if the warship class article is of adequate quality. The feasibility of comparing warship classes of various navies will depend on the particular classes involved. In any case Wikipedia editors should not compare classes by synthesizing information from reliable sources about individual ships, classes, or weapons systems; the class comparisons should be contained in the reliable sources. If no comparisons can be found in reliable sources then the Wikipedia article should contain no comparisons.