| 701 / | HD | DATA PROCESSING: VEHICLES, NAVIGATION, AND RELATIVE LOCATION |
| 1 | DF | VEHICLE CONTROL, GUIDANCE, OPERATION, OR INDICATION {19} |
| 3 | DF | .~ Aeronautical vehicle {4} |
| 4 | DF | .~.~ Altitude or attitude control or indication {6} |
| 13 | ![]() | .~.~.~ Spacecraft or satellite |