A missile includes several subvehicles that are initially mechanically coupled to a missile main body, and a separation system for separating the subvehicles from the missile main body. Specifically, a unitary header and tank unit is disclosed comprising a condenser header and tank unit arranged in parallel relation to a radiator header and tank unit. The outer frame slides vertically with respect to the inner frames to an open position or a closed position. A through hole penetrating in a direction crossing to the fastening groove in the first fastening member and a through hole penetrating in a direction crossing to the fastening groove in the second fastening member are provided with fastening devices. The optically transparent element is surrounded by the scintillator material. The display is switched through a transit screen based on a zoom-in screen or a zoom-out screen of a menu screen, and the menu screen is scrolled so as to display a focused icon at a predetermined position.