Something I find a little surprising, since Kantai Collection and some other games involving shipgirls have been relatively popular in the website for years, is that there's no consistency on what to call their battle equipment. Some posts tag it as rigging, some call it machinery, and, of course, some do both.. Now, I don't know if anything can or should be done about this. There are much more results for machinery kantai_collection than there are for rigging, so I wonder if the tag is redundant and it could all be filed under machinery for consistency, but most of the posts don't fit very well on its wiki page description of "detailed depictions of heavy mechanical equipment that is given visual emphasis in the picture".