| Answer | Crossword Clue |
|---|---|
| RHEOMETER | Device for indicating speed of blood circulation. |
| tach | a device for indicating speed of rotation |
| tachs | TACH, a device for indicating speed of rotation |
| sins | gyroscopic device indicating the exact speed and position of a vessel, as indicated by differences in positions over a given period on a given course, as well as the direction of true north |
