| Answer | Crossword Clue |
|---|---|
| ECHO | Sonar's principle |
| RADAR | Sonar's cousin |
| SOFAR | Sonar's cousin |
| DEPTH | Sonar's measurement |
| Answer | Crossword Clue |
|---|---|
| ECHO | Sonar's principle |
| RADAR | Sonar's cousin |
| SOFAR | Sonar's cousin |
| DEPTH | Sonar's measurement |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.