| 342 / | HD | COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) |
| 350 | DF | DIRECTIVE {10} |
| 361 | DF | .~ Including polarized signal communication transmitter or receiver {3} |
| 362 | | .~.~ Receiver only {2} |
| 363 | DF | .~.~.~> Circular |
| 364 | DF | .~.~.~> Eliptical |