Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Pre-dreadnoughts dauke da bindigogi na da dama daban-daban calibers, domin daban-daban matsayin a jirgin-to-jirgin yaki. Babban makamai shine bindigogi masu nauyi guda hudu, wanda aka sanya a cikin hasumiya biyu na tsakiya a gaba da baya. Ƙananan pre-dreadnoughts sun kauce daga wannan tsari. Wadannan bindigogi sun kasance masu jinkirin wuta, kuma da farko sun iyakance daidaito; amma su ne kawai bindigogi masu nauyi da zasu iya shiga cikin makamai masu karfi wanda ke kare injuna, mujallu, da manyan bindigogi na abokan gaba. Mafi yawan caliber don babban makamai shine 12-inch (305 mm), kodayake wasu jiragen ruwa suna amfani da kananan bindigogi saboda zasu iya samun karin wuta; Birtaniya na yakin basasa daga Majestic class a gaba sun yi amfani da wannan caliber, kamar yadda jiragen Faransa daga Charlemagne class (wanda aka ajiye a 1894). Japan, ta shigo da mafi yawan bindigoginta daga Birtaniya, ta yi amfani da bindigogi na 12-inch. Amurka ta yi amfani da bindigogi masu inci 12 (305 mm) da na inci 13 (330 mm) don yawancin shekarun 1890 har zuwa aji na Maine (ba za a rikita shi da Maine na farko na Spanish-American War notoriety) ba, wanda aka shimfiɗa a 1899, bayan da bindiga mai inci 12 ta kasance ta duniya. 'Yan Rasha sun yi amfani da 12 da 10-inch (254 mm) a matsayin manyan makamai; Petropavlovsk class, Retvizan, Tsesarevich, da Borodino suna da manyan batura masu inci 12 (305 mm) yayin da Peresvet class suka sanya bindigogi masu inci 10 (254 mm). Na farko na farko na Jamus na farko ya yi amfani da bindigogi na 11-inch (279 mm) amma ya rage zuwa bindigogi na 9.4-inch (239 mm) don azuzuwan biyu masu zuwa kuma ya koma bindigogi na 11-inch tare da Braunschweig class.  Tambaya: Waɗanne bindigogi ne Japan ta yi amfani da su, waɗanda suka shigo da su daga Biritaniya?
Bindigogi masu inci 12.