Feem ntau, txoj kab uas hla ntawm cov yeeb nkab uas peb nquag tau yog 76/89 / 114mm. Yog tias tus neeg yuav khoom muaj cov yeeb nkab nrog qhov tshwj xeeb, peb kuj tuaj yeem txo qhov taub kom tau raws li qhov xav tau. Hauv kev tsim khoom ntawm covmuab kauv pawgnrog cov txiv ntoo series, thawj zaug peb tau yuav cov khoom siv raw. Rau kev tsim cov kab kav dej, peb muaj 6 meters ntev thiab 12 meters ntev, feem ntau 6 meters.
