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There are basically four different types of buoys we might encounter in US waters: Red, green, red and green horizontally striped, and red and white vertically striped. We will talk about special buoys further below. Each one may or may not have a light. The light color will be green, red, or white. Lights are often used where greater caution must be exercised such as a bend or narrowing of a channel. Also, especially in areas where fog may exist, some buoys make sounds such as a whistle, bell, or gong. Green and red buoys.
The original version of the ACU uniform used a pixelated digital pattern known as the Universal Camouflage Pattern (UCP). UCP is similar to MARPAT, but uses more neutral, less saturated colors. The neutral colors, primarily foliage green and sand yellow, are designed to be work best in desert, woodland, and urban combat situations. The ACU in UCP was used by the army in all environments except for areas with snow, as the UCP pattern works poorly against white despite the heavy use of grey. An all-white BDU and the ECWCS are used instead for winterized warfare.