| 356 / | HD | OPTICS: MEASURING AND TESTING |
| 3 | DF | RANGE OR REMOTE DISTANCE FINDING {9} |
| 4.01 | DF | .~ With photodetection {11} |
| 5.01 | DF | .~.~ Of pulse transit time {3} |
| 5.05 | DF | .~.~.~ Having pulse transmission trigger significance {2} |
| 5.06 | | .~.~.~.~ Including optical pick-off of transmission start {1} |
| 5.07 | DF | .~.~.~.~.~> With specific counter type timing of returns |