In a radiation image storage panel composed of a support sheet and a phosphor layer formed on a surface of the support sheet by vapor-accumulating method, the phosphor layer is composed of prismatic crystals of phosphor aligned in the same direction, and each of the crystals has a convex surface at one end. Information is presented to the pilot by complementing a conventional moving map display with symbols centered on each landing location. A high-frequency transformer is connected to the output of each of the first and second inverters. Friction between the flexible planetary roller, the sun roller member, and the outer ring member transmits rotational motion and torque between the outer ring member and the sun roller member. Two engageable ridges are disposed on first and second lateral faces of the prism which are so positioned that the sensing surface is disposed between, and keep the prism positioned on the stage surface by engagement with a retention mechanism of the assay apparatus. The display device includes a first silicon oxide film, a silicon nitride film stacked on the first silicon oxide film, a second silicon oxide film stacked on the silicon nitride film, and a contact hole which extends through at least these three layers.