| 342 / | HD | COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) |
| 118 | DF | DETERMINING DISTANCE {11} |
| 134 | DF | .~ With pulse modulation {4} |
| 139 | ![]() | .~.~ Combined with determining direction {3} |
| 140 | DF | .~.~.~> With azimuth and elevation determination |
| 141 | DF | .~.~.~> Off boresight |
| 142 | DF | .~.~.~> With CRT display {2} |