The mark consists of two concentric circles with the band created between the circles divided into three equal crescent-shaped parts and with shading appearing beyond the outer edge of the outside circle; the mark consists of the colors white and blue, with the color white appearing in the line forming the inside circle, in the lines separating the crescent-shaped parts, and in the crescent-shaped parts, and with the color blue appearing in the shading beyond the outer edge of the outside circle, in the inner circle, and in the crescent-shaped parts; the colors are used to shade the mark in a way that suggests a three-dimensional representation.