Nau'in II submarines. Haihuwar U-Bootwaffe
Nau'in Submarines II D - biyu a gaba - da II B - daya a baya. Alamun ganewa suna jan hankali. Daga dama zuwa hagu: U-121, U-120 da U-10, mallakar 21st (horo) flotilla na karkashin ruwa.
Yarjejeniyar Versailles wadda ta kawo karshen yakin duniya na daya a shekara ta 1919, ta haramtawa Jamus musamman kerawa da gina jiragen ruwa. Duk da haka, shekaru uku bayan haka, don ci gaba da haɓaka ƙarfin ginin su, tsire-tsire na Krupp da filin jirgin ruwa na Vulcan a Hamburg sun kafa ofishin zane na Ingenieurskantoor voor Scheepsbouw (IvS) a Hague a cikin Netherlands, wanda ke haɓaka ayyukan jirgin ruwa don umarni na kasashen waje da kuma kula da gina su. Rundunar sojojin ruwan Jamus ce ta dauki nauyin ofishin a asirce, kuma rashin kwararrun ma’aikata a kasashen masu saye ya zama abin fakewa ga horar da jiragen ruwa na Jamus.
asali
Daga cikin umarni na kasashen waje da IVS ta samu, a sakamakon babban ɗakin shiga na Jamus, akwai umarni biyu na Finnish:
- tun 1927, uku Vetehinen 500-ton karkashin ruwa ma'adinai gina a karkashin kulawar Jamus a tashar jiragen ruwa Crichton-Vulcan a Turku, Finland (kammala 1930-1931);
- daga 1928 don hakar ma'adinai mai nauyin ton 99, wanda aka yi nufin tafkin Ladoga, wanda aka gina a Helsinki kafin 1930, mai suna Saukko.
An jinkirta wa'adin kammala odar ne saboda yadda tashoshin jiragen ruwa na kasar Finland ba su da gogewa wajen kera jiragen ruwa na karkashin ruwa, babu isassun ma'aikatan fasaha, haka nan kuma matsalolin tattalin arzikin duniya na karshen shekarun 20 zuwa 30 ne suka haddasa su. yajin da ke tattare da shi. Halin ya inganta saboda shigar da injiniyoyin Jamus (kuma daga IVS) da gogaggun masu ginin jirgi waɗanda suka kammala ginin.
Tun daga Afrilu 1924, injiniyoyi na IVS suna aiki a kan wani aikin jirgin ruwa mai nauyin ton 245 na Estonia. Finland kuma ta fara sha'awar su, amma ta yanke shawarar fara yin odar raka'a 500-ton. A karshen shekara ta 1929, sojojin ruwan Jamus sun fara sha'awar aikin wani karamin jirgin ruwa wanda ke da ɗan gajeren lokacin gini, wanda zai iya ɗaukar topedoes da ma'adinai da ke aiki a bakin tekun Burtaniya.
Vesikko - Gwajin Jamus a ƙarƙashin murfin Finnish
Bayan shekara guda, Reichsmarine ya yanke shawarar ƙaddamar da ƙaddamar da shigarwa na samfur don fitarwa. Manufar wannan ita ce ba da damar masu zane-zane na Jamus da masu kera jiragen ruwa su sami kwarewa mai mahimmanci don kauce wa kuskuren "yara" a nan gaba lokacin gina jerin jiragen ruwa akalla 6 don bukatun Jamus, yayin da ake samun lokacin ginawa wanda bai wuce ba. sati 8.
a kowane filin jirgin ruwa (tare da aikin zagaye na kowane lokaci). Gwaje-gwajen teku da suka biyo baya kuma sun kasance don ba da damar yin amfani da "tsofaffin" jami'an jirgin ruwa a cikin wurin ajiyar don horar da ƙananan jami'an. Dole ne a gina shigarwa a cikin mafi ƙarancin lokaci, tun da burin na biyu shine don gudanar da gwaje-gwaje tare da sabon torpedo - nau'in G - lantarki, 53,3 cm, 7 m tsawo - G 7e.
