For example, the collective "Checkmate" might be assigned to an entire company and thus "Checkmate Red 6" would be the first platoon leader (platoons are red for first, white for second, blue for third, black for headquarters, and often additional colors for other portions under the command), "Checkmate white 6" to the second platoon leader, etc. "Checkmate 6" is the Company Commander and "Checkmate 6 Romeo" is the commander's radio-telephone operator (Romeo the NATO phonetic of the letter R). Under NATO conventions, 6 is designated the commander or leader, 5 the second-in-command or executive officer, 7 the chief NCO.