This article is within the scope of the Military history WikiProject. If you would like to participate, please visit the project page, where you can join the project and see a list of open tasks. To use this banner, please see the full instructions.Military historyWikipedia:WikiProject Military historyTemplate:WikiProject Military historymilitary history articles
This article has been checked against the following criteria for B-class status:
This article is within the scope of WikiProject Ships, a project to improve all Ship-related articles. If you would like to help improve this and other articles, please join the project, or contribute to the project discussion. All interested editors are welcome. To use this banner, please see the full instructions.ShipsWikipedia:WikiProject ShipsTemplate:WikiProject ShipsShips articles
Start a discussion about improving the USS R-21 page
Talk pages are where people discuss how to make content on Wikipedia the best that it can be. You can use this page to start a discussion with others about how to improve the "USS R-21" page.
.jpg)
