| 342 / | HD | COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) |
| 350 | DF | DIRECTIVE {10} |
| 352 | DF | .~ Including a satellite {6} |
| 357.01 | DF | .~.~ With position indicating {5} |
| 357.02 | DF | .~.~.~ With accuracy enhancing {2} |
| 357.04 | | .~.~.~.~ With ambiguity resolving |