The present invention relates to a method of increasing the safe operation and cruise speed of a ship, and more specifically, to manufacture and attach a mechanism that protects the screw and direction keys, which are the main parts of a small ship, and prevents left and right side swings of the hull. It's about how to give. To this end, the present invention compresses the treasure of the screw and the seawater and concentrates the injection, manufactures and installs a jet propeller that can function as a direction key, attaches a triangular double wing to reduce left and right shake of the hull, and attaches between the two wings. It is possible to prevent collision with floating materials in advance by installing protective wire mesh cover.;Injection Propeller, Arrow Keys, Tri-Dual Wings, Shield Wire Cover
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