Mini submarine 22 m is a midget class submarine with 22 m of length and 3 m of diameter. This submarine is capable to operating at depth of up to 150 m under sea surface and has a maximum speed to 10 knots at submerged condition. Designed without weapon system, the submarine operated by 12 crew, and able to cruise for 6 days, and diving for 26 six hours without air regeneration. This submarine was designed by LPPM-ITS together with BALITBANG-KEMHAN RI, PT. PALINDO MARINE, BTH-BPPT, and LPPM-UI as consortium.