In the immediate future, the On Board Weight and Balance System (OBWBS) application will probably only function as a check of the conventional weight and balance manifest. However, the intent of this specification is to provide a primary system of weight and balance control which is supported by a manifest system. Eventually, an OBWBS may be totally automatic providing a computerized check of all the mass property limitations involved; however, that kind of OBWBS hardware is currently beyond the scope of this document. The actual application of this specification is, of course, up to the user.