🌐EnglishEnglishDeutschFrançaisPolskiРусскийفارسی中文EntityQ3062337· pop 6· linked from 531 articlesUSS O-121917 O-class submarineConnectionshistory of AntarcticaEntityGeneral Dynamics Electric BoatCompanyCategories1917 shipsAtlantic Ocean articles missing geocoordinate dataMilitary in the ArcticShips built in Groton, ConnecticutShipwrecks in the Norwegian SeaSource attributionUnited States O-class submarinesWorld War I submarines of the United States