The present invention can reduce the time required to launch an armed weapon inside an armed fire tube by changing the position of a waiting water ramp piston for launching an armed weapon inside a water ram cylinder, So that the performance can be maximized. ; In order to accomplish the above-mentioned object, the present invention provides a submarine including: a weapon launching tube 10 provided for launching a weapon 14 in a submarine; and a pressure chamber 20 of the armed launching tube 10, A water hammer piston 22 which is movably installed in the water hammer cylinder 16 and a water hammer piston 22 which moves the one end of the water hammer piston 22 and the first connecting rod 28 A balance cylinder 30 for movably receiving a second connecting rod 32 coupled with the other side of the water ram piston 22 and communicating with the atmosphere, ). / RTI ; Submarine, Armed, Firing, Water Ram, Cylinder, Piston, Balance
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