🌐EnglishEnglishDeutschFrançaisPolskiالعربيةفارسی中文EntityQ2207347· pop 6· linked from 38 articlesSM U-681915 UD-class submarineOn the mapAvailable in 6 languagesFrançaisDeutsch中文العربيةفارسیvia Wikidata sitelinks · CC0ConnectionsImperial German NavyEntitylength overallEntityCategories1915 shipsGerman Type U 66 submarinesMaritime incidents in 1916Ship infoboxes without an imageShips built in KielShipwrecks of IrelandU-boats commissioned in 1915U-boats sunk by British warshipsU-boats sunk in 1916World War I shipwrecks in the Atlantic OceanWorld War I submarines of Germany