Understanding Household 6
The United States Army uses tactical call signs that are often assigned to a company sized unit or higher. For example the collective “Checkmate” might be assigned to an entire company and thus “Checkmate 1″ would be the first platoon leader , “Checkmate 2″ to the second platoon leader, etc. As there are usually only 4 platoons, “Checkmate 5″ becomes the Company XO and “Checkmate 6″ is the Company Commander.
A humorous reference to a person in the household, usually the wife, is “Household 6″ or HH6. This is because the number six denotes the element leader on the radio when using unit call signs. (i.e. If you heard “warrior six” on the radio, you would know you were speaking to the leader of the unit known to those on that radio net as “warrior”.)
PDF 
