| 342 / | HD | COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) | 
| 104 | DF | DETERMINING VELOCITY {9} | 
| 109 |  | .~ Combined with determining distance {3} | 
| 110 | DF | .~.~> With plural fixed range gates | 
| 111 | DF | .~.~> With plural receiver frequency band separation | 
| 112 | DF | .~.~> With plural frequencies transmission |